hp500 in Mach26 [Archive] - RiverRacer.Net

dcb carrera

06-09-2003, 04:51 AM

Has anybody had a problem with fouling out plugs on a hp500. I think it from idling around the channel. I have 93 hours on motor, is that the normal time to change plugs anyway? It's missing at low rpm's and I seem be losing a little at top in. Any input would help, Thanks

Jrocket

06-09-2003, 05:24 AM

Is it EFI or carbed?

dcb carrera

06-09-2003, 06:17 AM

It's EFI

Dave C

06-09-2003, 11:37 AM

mine runs kinda fat... :(
don't know if it would help but I am gonna try a MSD and see if it cleans it up.

Steamin' Rice

06-09-2003, 01:12 PM

I have a 2002 HP500EFI in my boat with 100 hrs and just replaced the cap, rotor and plugs....I wasn't having any trouble with them but figured it was probably about time. I did seem to run a little better after the changes, but that could just be me trying to justify the money I spent... :D

SVO 540

06-09-2003, 01:36 PM

You could try running a different spark plug. I am not an expert, but I think that a hotter spark plug would be less likely to foul at idle speeds.

hpron

06-09-2003, 02:50 PM

I am by no means a expert but I can share with you what I had done..opened the gap to .040,had the plugs indexed,{aligned}and moved to a hotter one..cant remeber but Arizona Speed gave me the number..last long run had a 45min.{at idle speed thru Manatie zone} haul to the course and no trouble since..ps..running high test and its making a difference..
[ June 09, 2003, 03:52 PM: Message edited by: hpron ]

Dave C

06-09-2003, 03:31 PM

I understand that the computer runs this motor fat. (for longevity) Cougar Boats confirmed what I had suspected.
Does yours spit out a lot of black soot when operated at WOT? and then not so much soot when not operated at WOT? Mine does. It also smells fat at idle.
I just changed a fouled set of plugs that looked like they came out of a two stroke lawn motor that needs a new set of rings. :(
I am going to try a hotter set of plugs, wider gap & MSD and see what works.

dcb carrera

06-09-2003, 04:33 PM

My biggest concern is that the plugs aren't going to be the problem for the engine missing at low rpm's. The plug I took out did look like a two stroke plug, I plan on replacing them when I go back to Havasu. Hopefully that will fix my problem. I'm going to replace them with the identical plug. I can live with 93 hours between changes.

Jrocket

06-09-2003, 05:23 PM

This is what I was told to do from many different people.Run the AC Delco Rapid Fire #1 plug at .040 and try putting on an MSD box..First thing I would do is put all new plugs in and run it for a few hours.Pull all the plugs and get a reading from them.Check to see if they are all looking the same or if some are different to each other.Find out which cylinders are richer and check the plug wires on those cylinders.Did you ever have a tune up done on the motor since you bought it?What plug are in it.Ac Delco MR43T? I was having a similar problem but mine is looking like its one bad injector or plug wire.I havent had time to check the two yet.This is how i found what was going on with my HP though...One thing at a time...

dcb carrera

06-09-2003, 05:33 PM

No tune up yet. The stock plug that came out of it is a ngk-r/ br6fs. I only took out one plug it look bad so I figured that was the problem. I hope that it is because it seems I never have much more than a couple days to go to the lake. If this doesn't cure the problem I will probably have to drag it back to Paso Robles to work on it frown

Jrocket

06-09-2003, 05:43 PM

Look at the top of the intake and it will say what plug should be in the motor stock.I run the NGK's in mine now and they seem to be ok.Il bet you just need new plugs.What gas are you running?

dcb carrera

06-09-2003, 06:35 PM

I'm running 92 octane, a buddy of mine said run one tank of 100 octane but I don't think I want to do that. I hope your right about the plugs.

Jrocket

06-09-2003, 06:38 PM

I thought you would say that.I did the same thing,ran 91 in mine for awhile.Loaded up and would run really crappy.Start running 87 from Chevron or Shell,something like that.Put in new plugs and ONLY 87 octane...You will notice the difference,runs cleaner and not as much soot on the transom...TRUST me..Ask around and any shop should say the same thing.

dcb carrera

06-09-2003, 06:44 PM

Let me get this right, your saying after I replace the plugs I should start using 87 octane? If this what your saying why does it run better :confused:

Jrocket

06-09-2003, 06:48 PM

The HP500 is a fairly low compression motor.It is set to run rich from the factory.If you use a high octane gas it doesnt burn fast enough to burn all the gas off in the combustion chamber.Basically you are spitting unburned gas out the exhaust valve.when you lower the octane of the gas it makes for a hotter,faster burn rate in the combustion chamber.It si the same way if you have a high compression motor,you run higher octane gas.Whish is a slower burn rate to cool the combustion chamber down...Did I lose ya
?

Jrocket

06-09-2003, 06:54 PM

470 Propshaft Rated Horsepower.
4800-5200 Full Throttle RPM Range.
8.2/502cid Displacement.
Bore: 4.47 (114mm).
Stroke: 4.00 (102mm).
Compression Ratio 8.75:1.
Alternator: 60/847 (amp/watt).
Digital ignition.
MPI fuel system.
Fuel: 87 Posted Octane (r+m)/2.
Std Bravo one XZ, or opt Bravo one XR, or Dry sump six Outdrive Units.
1.36:1, 1.5:1, right or left gear ratio.
Length: 47.5/1207 (in/mm).
Width: 34/857 (in/mm).
Height: 22/560 (in/mm).
Weight: 1113/506 (lbs/kg).
See the motor is only 8.75:1...this is fairly low for a 502 inch motor.Especially fuel injected.87 octane and new plugs...Youll be good to go.
[ June 09, 2003, 07:55 PM: Message edited by: Jrocket ]

dcb carrera

06-09-2003, 07:00 PM

I believe you I wonder why they tell you to run 92, what you said made sense. My transom is also a mess, I figure about an hour to clean every time I come out. Thanks for the input I will let you know how it runs.

Jrocket

06-09-2003, 07:05 PM

If your doubtful or worried about 87.Call and ask around...it never can hurt.

dcb carrera

06-09-2003, 07:09 PM

No, I'm going for it. I'll let you know the results.Thanks Another question what could it possibly hurt anyways?

Havasu Cig

06-10-2003, 06:55 AM

Jrocket is right....This has been discussed on Offshoreonly.com several times. The motor will run better on 87 octane. Others on OSO have had the same problems as you because they were running 91-92 octane.
I run 87 in mine and they run a little rich, but not like you are decribing. Change the gas and you should notice a difference.

Havasu Cig

06-10-2003, 06:56 AM

Now that I think about it, I think on the top of the motor it says 87 octane for fuel along with the other specs.

dcb carrera

06-10-2003, 07:08 AM

You guys are definably making a believer of me. When I get back to Havasu I will look on the engine to see if that what it says. Next fill up will be 87 octane. Thanks again

Steamin' Rice

06-10-2003, 07:57 AM

I agree with the others on the 87 octane....I filled up with 91 once and the boat ran worse than it did with the 87....

Dave C

06-10-2003, 08:34 AM

I have been running 91 octane in mine too. The transom looks like someone painted it black. :(
Plugs are AC's MR43T's. I notice the NGK's cross reference to the AC 43's.
I just changed the plugs on Saturday and each one was fuel fouled.
Thanks for the fuel tip!. I am going to try 87 octane too.(especially since gas is $2.00/gallon here in Norcal!) At 8.75:1, it ain't gonna hurt nothing.

LevoeDCB22

06-10-2003, 01:37 PM

What kind of mph numbers are you guys seeing with the hp500 on the 26, and with what props, any of you guys running with the 525?

dcb carrera

06-10-2003, 02:58 PM

Running about 75 to 80+ with 28 lab prop. Depending on the heat and water conditions. Thats on a speedo. Thats when its running good :D

Jrocket

06-10-2003, 06:02 PM

I run a 28lab Bravo 1.....Best of 83mph,2 people full tanks of gas...Last trip 28 bravo1 half tanks,two people.80.2 Wasnt a good day...

Outofgas

06-10-2003, 07:18 PM

I have the same problem with my 500 EFI . I got some 92 on the lake and the boat won't get out of it's own way. I have been running 87 and it was running better. I am taking it to alco on monday I will let you now what thay say.
[ June 10, 2003, 08:23 PM: Message edited by: Outofgas ]

MKE - POWER

06-10-2003, 07:46 PM

Hey OUTTAGAS,
you gonna be there a few days or just S/M ?

Dave C

06-11-2003, 09:45 AM

BTW, I checked out the sticker on the motor and the owners manual. Minimum octane rating is 87.

waterndog

06-11-2003, 11:58 AM

Jrocket:
The HP500 is a fairly low compression motor.It is set to run rich from the factory.If you use a high octane gas it doesnt burn fast enough to burn all the gas off in the combustion chamber.Basically you are spitting unburned gas out the exhaust valve.when you lower the octane of the gas it makes for a hotter,faster burn rate in the combustion chamber.It si the same way if you have a high compression motor,you run higher octane gas.Whish is a slower burn rate to cool the combustion chamber down...Did I lose ya
? So would the same hold true for the 500hp carb or just for the EFI?

Jrocket

06-11-2003, 05:13 PM

waterndog:
Jrocket:
The HP500 is a fairly low compression motor.It is set to run rich from the factory.If you use a high octane gas it doesnt burn fast enough to burn all the gas off in the combustion chamber.Basically you are spitting unburned gas out the exhaust valve.when you lower the octane of the gas it makes for a hotter,faster burn rate in the combustion chamber.It si the same way if you have a high compression motor,you run higher octane gas.Whish is a slower burn rate to cool the combustion chamber down...Did I lose ya
? So would the same hold true for the 500hp carb or just for the EFI? I dont know too much about the carbed motor.I do know they run rich from the factory and break valve springs at about 150 hours or so.I dont know from experience but stuff that I have read and heard.

Jrocket

06-24-2003, 05:33 PM

Is this anybody from here?
http://www.***boat.com/image_center/data/509/232OP6_078-med.jpg

Jrocket

06-24-2003, 05:39 PM

Well,I put in the MSD box and longer reach plugs.Almost all the soot on the transom is gone.It is so much nicer now.I do have to fix one bad injector,that isnt closing all the way but the other side of the transom is very nice now...
It definately runs crispier and cleaner...I ran on GPS 85.4 in the evening with half tanks and just me in the boat with a 28 Bravo1(non lab) out board prop!!!Thats my best numbers so far,an no I dont think the MSD had anything to do with it. :D

dcb carrera

06-24-2003, 06:15 PM

Put in the new plugs last weekend but didn't have time to take it out. I plan on taking it out this weekend with 87 octane gas. I also cleaned the the air filter it was completly filled with carpet fibers, hopeing everything go's well.

mike37

06-24-2003, 07:04 PM

Jrocket:
Is this anybody from here?
http://www.***boat.com/image_center/data/509/232OP6_078-med.jpg I think thats me on the other side
in the HTM with bimminie on

Havasu Cig

06-25-2003, 07:55 AM

I heard the valve spring problem was only on the carbed motors.

rude235

06-25-2003, 12:54 PM

jrocket, i'm sure you've answered this question a ton of times but what boat do you have? are you running a mach 26 with a 500efi? and you are getting 85 on gps with a bone stock motor, drive, and prop??? i've got an '01 25 daytona with a 500efi, 28in. 4 blade bravo, xz drive w/ 1.50 gears. i've seen 80.3 on gps with 2 people in the boat at lake mead(i don't remember how much fuel was on board). i've only had the boat that fast one time so far and didn't really play with the trim much. are those numbers realistic for a daytona, or are they that much slower than a dcb?

Jrocket

06-25-2003, 01:45 PM

rude235:
jrocket, i'm sure you've answered this question a ton of times but what boat do you have? are you running a mach 26 with a 500efi? and you are getting 85 on gps with a bone stock motor, drive, and prop??? i've got an '01 25 daytona with a 500efi, 28in. 4 blade bravo, xz drive w/ 1.50 gears. i've seen 80.3 on gps with 2 people in the boat at lake mead(i don't remember how much fuel was on board). i've only had the boat that fast one time so far and didn't really play with the trim much. are those numbers realistic for a daytona, or are they that much slower than a dcb? Well your numbers are really close to mine.I have a Mach 26 with Hp500EFI,Bravo1 with 1.50 gears and a Bravo1 28 prop.Last weekend down at Parker in the afternoon time I ran a best of 85.4 and a 84.4 on GPS.Two half tanks or there abouts with loaded ice chest and other light stuff in the boat.The water was choppy and a small very light head wind.I ran 85 into the wimd and 84 away from the wind.With 2 people and full tanks of gas,I can only get around 80-82.With my lab Bravo1 28,I could get 80-83 with 3-4 people and almost full tanks.On a hot day 80-83 is the normal,so Id'say the Daytona is about the same..Trim in a cat is all the difference in the world,especially if your loaded with people or wind conditions..From what Ive found out atleast.

Phat_Kat

06-25-2003, 01:51 PM

dcb/carrera:
Has anybody had a problem with fouling out plugs on a hp500. I think it from idling around the channel. I have 93 hours on motor, is that the normal time to change plugs anyway? It's missing at low rpm's and I seem be losing a little at top in. Any input would help, Thanks what kind of speeds are you getting? 80?

mbrown2

06-25-2003, 02:09 PM

JRocket, those are good numbers you are running and backup what they tested in ***boat a couple of years back. Also, you might be a little quicker with the closed bow than they tested..

Jrocket

06-25-2003, 02:19 PM

mbrown2:
JRocket, those are good numbers you are running and backup what they tested in ***boat a couple of years back. Also, you might be a little quicker with the closed bow than they tested.. Hey MB....whats new dude? My boat is about the same as what the test boats came up with.Maybe on the 4th you and I can race our DCB's to see how they run.Ive got $100 says I can beat YOUR DCB...LOL HEHEHEHEHEHE :D

mbrown2

06-25-2003, 02:29 PM

Jrocket:
mbrown2:
JRocket, those are good numbers you are running and backup what they tested in ***boat a couple of years back. Also, you might be a little quicker with the closed bow than they tested.. Hey MB....whats new dude? My boat is about the same as what the test boats came up with.Maybe on the 4th you and I can race our DCB's to see how they run.Ive got $100 says I can beat YOUR DCB...LOL HEHEHEHEHEHE :D It would be pretty easy to beat my DCB, since it no longer my DCB, but come September...well lets just say things might be different.. :) :D :)

Jrocket

06-25-2003, 02:32 PM

MB......Shhhhhhhhhh!!!! Bite your tongue Mike... :D

kab

06-25-2003, 02:36 PM

Too bad you still dont have it Mbrown2 you could have had 100 extra cash.

mbrown2

06-25-2003, 02:44 PM

Kab, I would not feel good about taking JRocket's money, but I would have had no problems putting the switches down on him... :) :D :)
[ June 25, 2003, 03:45 PM: Message edited by: mbrown2 ]

Jrocket

06-25-2003, 02:46 PM

kab:
Too bad you still dont have it Mbrown2 you could have had 100 extra cash. Yeah its just too bad!!!! LMAO :D

boxscore

06-25-2003, 02:46 PM

Hey Mike... when are you going in the mold? Nothin' better than the smell of resin in the morning

Jrocket

06-25-2003, 02:49 PM

mbrown2:
Kab, I would not feel good about taking JRocket's money, but I would have had no problems putting the switches down on him... :) :D :) What? you dont want my cash......oh I get it,you want to chase me down river and kick my ass in front of Fox's bar and everyone else that was on Parker strip that day....just like Riverliver did.I see how it is!!!! :p :D :D
Just remember MB...You get what you order,but I can always upgrade!!!

dcb carrera

06-25-2003, 02:50 PM

mbrown2, Why did you sell your DCB? What boat are you planning on getting? Is it a secret :confused: You can tell me I won't tell anybody wink

mbrown2

06-25-2003, 02:51 PM

I hear ya, you can always upgrade and your drive can always break... :) :D

mbrown2

06-25-2003, 02:53 PM

mispost
[ June 26, 2003, 06:16 PM: Message edited by: mbrown2 ]

Jrocket

06-25-2003, 02:55 PM

mbrown2:
I hear ya, you can always upgrade and your drive can always break... :) :D Drives can be upgraded too!!! :D Quit being a DCB bully MB!!!! :p

mbrown2

06-25-2003, 02:57 PM

Truce...but I bet mine will float faster from the dam than yours :) :D :)

Jrocket

06-25-2003, 03:02 PM

mbrown2:
Truce...but I bet mine will float faster from the dam than yours :) :D :) Now you definately got me on that one.I have seen you in your DCB about 6 times and never once seen it running or you driving!!! Just floating,every single time I saw ya..... :D

mbrown2

06-25-2003, 03:05 PM

Takes alot of R&D and Testing to be a fast floater on the Parker strip, and I am all about putting in the overtime to find the perfect combination.

mbrown2

06-25-2003, 03:08 PM

Jrocket:
mbrown2:
you want to chase me down river and kick my ass in front of Fox's bar and everyone else that was on Parker strip that day....just like Riverliver did.I see how it is!!!! :p :D :D
BTW...Our crew was at Foxes as you guys went buy; that was a cool site, and both boats looked great going by.....Just before that Cyclone went by running and that was cool site as well.
[ June 29, 2003, 05:30 PM: Message edited by: mbrown2 ]

TOBTEK

06-25-2003, 03:17 PM

mbrown2:
Jrocket:
mbrown2:
JRocket, those are good numbers you are running and backup what they tested in ***boat a couple of years back. Also, you might be a little quicker with the closed bow than they tested.. Hey MB....whats new dude? My boat is about the same as what the test boats came up with.Maybe on the 4th you and I can race our DCB's to see how they run.Ive got $100 says I can beat YOUR DCB...LOL HEHEHEHEHEHE :D It would be pretty easy to beat my DCB, since it no longer my DCB, but come September...well lets just say things might be different.. :) :D :) "It would be pretty easy to beat my DCB, since it no longer my DCB, but come September...well lets just say things might be different.."
wow....the cats coming out of the bag. DO tell :D

mbrown2

06-25-2003, 03:23 PM

nothing exists, so theres nothing to tell :confused:

TOBTEK

06-25-2003, 03:28 PM

mbrown2:
nothing exists, so theres nothing to tell :confused: http://www.***boat.com/image_center/data/523/135cowling_003-med.jpg
RIGHHHHHHHHHHHT. :rolleyes: :D ...... Do I need to get a few of these ready for you SIR?
[ June 25, 2003, 04:31 PM: Message edited by: TOBTEK ]

Jrocket

06-25-2003, 03:30 PM

TOBTEK:
mbrown2:
Jrocket:
mbrown2:
JRocket, those are good numbers you are running and backup what they tested in ***boat a couple of years back. Also, you might be a little quicker with the closed bow than they tested.. Hey MB....whats new dude? My boat is about the same as what the test boats came up with.Maybe on the 4th you and I can race our DCB's to see how they run.Ive got $100 says I can beat YOUR DCB...LOL HEHEHEHEHEHE :D It would be pretty easy to beat my DCB, since it no longer my DCB, but come September...well lets just say things might be different.. :) :D :) "It would be pretty easy to beat my DCB, since it no longer my DCB, but come September...well lets just say things might be different.."
wow....the cats coming out of the bag. DO tell :D Its a long running joke between MB and myself.I always ask him why he has a nice and fast DCB but never drives it.I think he's afraid to put gas in it.Its got the same gas in it from when he bought it!!!! LMAO :D :p

TOBTEK

06-25-2003, 03:33 PM

I had a "OH MY GOD" moment last time at the pump! It was bone dry. Good thing they accept AMERICAN DESTRESS :D

mbrown2

06-25-2003, 03:35 PM

JRocket, those whipples and blowers love the gas...and I am sure the 3.3 version will like it even more... :)

mbrown2

06-25-2003, 03:36 PM

Toby, that cowling looks trick.

Jrocket

06-25-2003, 03:43 PM

mbrown2:
JRocket, those whipples and blowers love the gas...and I am sure the 3.3 version will like it even more... :) I hear ya..I will be finding out shortly,I hope.

TOBTEK

06-25-2003, 03:56 PM

mbrown2:
Toby, that cowling looks trick. Hey thanks, Its looking OK for a QUICKIE job, Plus its good enough for who its for ;)one more color sand and a few more coats-o-clear and im done! sure wish I had to paint TWO for my little/slow/heavy/retro disco MACH22/wanta-B MACH26.

mbrown2

06-25-2003, 04:05 PM

With the back of the boat blue, and the flames starting off in white on the cowling...that will look trick together..

riverliver

06-25-2003, 04:09 PM

Jrocket:
mbrown2:
JRocket, those whipples and blowers love the gas...and I am sure the 3.3 version will like it even more... :) I hear ya..I will be finding out shortly,I hope. Hmmmmmmmmmm !!!!! sleeping sleeping

TOBTEK

06-25-2003, 04:13 PM

mbrown2:
With the back of the boat blue, and the flames starting off in white on the cowling...that will look trick together.. :D :D :D hope so, thanks. Kinda wish I would have done some jiggy shi- in the white. Some marberlizing or glitter, ya can never be to PIMP, right wink

riverliver

06-25-2003, 04:16 PM

http://www.***boat.com/image_center/data/523/135cowling_003-med.jpg
You do very nice work TOBTEK.

Phat_Kat

06-25-2003, 04:20 PM

riverliver:
http://www.***boat.com/image_center/data/523/135cowling_003-med.jpg
You do very nice work TOBTEK. I'll take that in black and red please :D

TOBTEK

06-25-2003, 04:28 PM

thanks Riverliver & Phatcat I enjoy doing them untill something goes wrong. Like yerterday when I started spraying some clear and it was being rejected by the degreaser :mad: thats allways a nice thing to see after you have been color sanding for five hours. I dont have fingerprints anymore on my right hand.....

woodster

06-25-2003, 04:49 PM

TOBTEK:
mbrown2:
nothing exists, so theres nothing to tell :confused: http://www.***boat.com/image_center/data/523/135cowling_003-med.jpg
RIGHHHHHHHHHHHT. :rolleyes: :D ...... Do I need to get a few of these ready for you SIR? That is badass..Nice work Tob. U sure u dont wanna paint me a helmet? :D
[ June 25, 2003, 05:50 PM: Message edited by: woodster ]

TOBTEK

06-25-2003, 05:15 PM

woodster:
TOBTEK:
mbrown2:
nothing exists, so theres nothing to tell :confused: http://www.***boat.com/image_center/data/523/135cowling_003-med.jpg
RIGHHHHHHHHHHHT. :rolleyes: :D ...... Do I need to get a few of these ready for you SIR? That is badass..Nice work Tob. U sure u dont wanna paint me a helmet? :D WOODSTER, I have a Shoei HOTWHEEL's troyless designs VFX-R I wore maybe three times id make you a deal on. Just sitting in the garage, im bikeless right now. but your not getting my VFX with real money flames inlaid in it.....never,never :D

woodster

06-25-2003, 06:01 PM

Thanks for the offer Tob but I already bought a white Shoei and im looking for somebody to paint it. Troy lee wants like 600 bucks for a pretty basic paint job.Do you know anybody else in socal who does good work? I may send it to List but its 8 weeks min turn around.

TOBTEK

06-25-2003, 07:27 PM

woodster:
Thanks for the offer Tob but I already bought a white Shoei and im looking for somebody to paint it. Troy lee wants like 600 bucks for a pretty basic paint job.Do you know anybody else in socal who does good work? I may send it to List but its 8 weeks min turn around. LIST is good, have you called Alex @ AP DESIGNS in San Marcos? Cool guy and insaine work(if HE does it) I think he is as good if not better than TROYLEE. I had TLD do a helmet last year and was very DISappointed. The finish work was pretty bad! AP's # is 760-471-1024 I think?

Jrocket

06-25-2003, 07:44 PM

Alex@ AP Designs paints all of my helmets and 3 or 4 of my friends helmets.He does awesome work and yes he is right there with Troy on design and quality.

woodster

06-26-2003, 04:30 PM

Jrocket:
Alex@ AP Designs paints all of my helmets and 3 or 4 of my friends helmets.He does awesome work and yes he is right there with Troy on design and quality. Hey Jrocket.. Whats a ballpark price on a basic job?

Jrocket

06-26-2003, 05:08 PM

woodster:
Jrocket:
Alex@ AP Designs paints all of my helmets and 3 or 4 of my friends helmets.He does awesome work and yes he is right there with Troy on design and quality. Hey Jrocket.. Whats a ballpark price on a basic job? I couldnt even guess on that one.Painting options can vary so much that the price is hard to guess.His prices are close to Troys I would think.Obviously if you order something unique,you'll have to pay top $$$$