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View Full Version : Opinions please...350 vs. 377



tamalewagon
10-01-2005, 12:10 PM
OK...finally made the choice to purchase 22 Stealth. What's everyone's opinion on the power choice of 350 vs. 377 and why? I'm most likely not going to consider going up to the 496, so let's not go there.

KACHINA KEN
10-01-2005, 12:13 PM
OK...finally made the choice to purchase 22 Stealth. What's everyone's opinion on the power choice of 350 vs. 377 and why? I'm most likely not going to consider going up to the 496, so let's not go there.
There are a few 377 scorpions still in crate available but it is a discontinued product.

Dribble
10-01-2005, 12:14 PM
I hear that Mercruiser has or is just about to release a 383 small block / Bravo package that is 320 HP with a full two year warranty. The 377 is a great engine but way pricey.

termiteguy
10-01-2005, 12:18 PM
i have the 377 in mine its not bad ..........if you can swing it go with the 496 i wish i had small blocks just dont have the power needed.

tamalewagon
10-01-2005, 12:21 PM
I know the Scorpion is discontinued, but Merc does make the 6.2 which is a 370 (ish)...isn't it? It has 320HP. I saw it in the Sept 2003 issue on a write up of Shockwaves 21 step skier. The 6.2MX/Bravo 1 package. That's the one I was (trying to) referring to.

termiteguy
10-01-2005, 12:23 PM
I know the Scorpion is discontinued, but Merc does make the 6.2 which is a 370 (ish)...isn't it? It has 320HP. I saw it in the Sept 2003 issue on a write up of Shockwaves 21 step skier. The 6.2MX/Bravo 1 package. That's the one I was (trying to) referring to.
that the one i have it is the 377

tamalewagon
10-01-2005, 12:23 PM
i have the 377 in mine its not bad ..........if you can swing it go with the 496 i wish i had small blocks just dont have the power needed.
What about throwing a whipple charger on it? Steve at Ultra made that suggestion which is why I don't think I will consider the 496. That and the wife doesn't like the "look" of the raised engine hatch. Shoot...as long as the engine goes "vroom vroom" and pulls skiers with a load, I'm a happy guy.

tamalewagon
10-01-2005, 12:24 PM
that the one i have it is the 377
You have it on the 22 Stealth? What type of MPH do you see? Does it get good hole shot pulling a skier and full load?

termiteguy
10-01-2005, 12:30 PM
You have it on the 22 Stealth? What type of MPH do you see? Does it get good hole shot pulling a skier and full load?
yes 22 stealth 65 mph or so alone about 55 with a full boat 22 prop 4 blade all speedes are according to the speedo not gps it pull skiers well

tamalewagon
10-01-2005, 12:33 PM
yes 22 stealth 65 mph or so alone about 55 with a full boat 22 prop 4 blade all speedes are according to the speedo not gps it pull skiers well
Good deal...have you thought about the supercharger or whipple avenue? Just curious as to your thoughts there.

69 Elim
10-01-2005, 12:39 PM
I have a 21 step skier shockwave - with the 6.2, bravo 1 - same package.
with 4 guys, the skier has to be patient - it won't snap you up. but, it will do 55 mph with throttle left w/ 10 people on board.
I grew up learning to ski behind a flatbottom v-drive and am used to having my arms ripped off.
I think my boats about max compacity w/ 7 people. with 7 people, the boat isn't too crowded and performance is good. top speed is 60 or so and the hole shot is ok. hole shot could be better but I don't really ski (we mostly tube) so it works out great. I have no idea on what prop is on it.
I thought about a wipple, but have settled that the boats performance is just fine. The wife love it, it handles great - easy to drive.
top speed - well, we've seen 64 on speedo with 2 people on board.
I call it the mini-van boat. But then again, nothing really compares to a blown flatbottom v-drive :cool:
Overall, I think my boat cruises best at 45 mph.
Not sure about gas mileage compared to a 496 - but would guess my small block uses less of that expensive liquid gold.

termiteguy
10-01-2005, 12:40 PM
thought about it my dad is a big block guy he tells me i will never get enough tork from a small block to get the hole shot i am looking for need a big block for that.

tamalewagon
10-01-2005, 12:42 PM
I have a 21 step skier shockwave - with the 6.2, bravo 1 - same package.
with 4 guys, the skier has to be patient - it won't snap you up. but, it will do 55 mph with throttle left w/ 10 people on board.
I grew up learning to ski behind a flatbottom v-drive and am used to having my arms ripped off.
I think my boats about max compacity w/ 7 people. with 7 people, the boat isn't too crowded and performance is good. top speed is 60 or so and the hole shot is ok. hole shot could be better but I don't really ski (we mostly tube) so it works out great. I have no idea on what prop is on it.
I thought about a wipple, but have settled that the boats performance is just fine. The wife love it, it handles great - easy to drive.
top speed - well, we've seen 64 on speedo with 2 people on board.
I call it the mini-van boat. But then again, nothing really compares to a blown flatbottom v-drive :cool:
Overall, I think my boat cruises best at 45 mph.
Not sure about gas mileage compared to a 496 - but would guess my small block uses less of that expensive liquid gold.
That's the truth...another of the consideration factors=liquid gold.

rivercrazy
10-01-2005, 12:49 PM
If you can get your hands on a 377 Scorpion motor - get it over the 6.2. Especially if your thinking about upgrading it down the road. The Scorp motor has all the good hard parts in it. The 6.2 has mostly cast parts.
The 6.2 has 320hp. The 377 Scorp has 360

tamalewagon
10-01-2005, 01:16 PM
thought about it my dad is a big block guy he tells me i will never get enough tork from a small block to get the hole shot i am looking for need a big block for that.
Then perhaps I SHOULD be considering the possibilities of the 496 too. I am an avid skier and do not appreciate being drown by a slow take off.

goneboatin
10-01-2005, 01:23 PM
I've got the 350 Merc Mag MPI in my 22' Howard. I'm running a tweeked 19" Revolution 4. My boat with 6 peeps and both tanks half full, it'll do about 60 mph. It's a heavy boat, but it's faster than my friend's 21 Hallett with at 454, but his boat is 15 years old.
When I do ski, I drag a while, but my weight has gone up about 30 lbs from when I bought my 65" ski 15 years ago, probably if my ski was longer I wouldn't drag as long.
The 350 is good engine if you don't want to go real fast or be real quick. My boat isn't a race boat and if I do go fast, I get the stink eye from the wife. And now with gas at over $3.00 a gallon, I don't really mind having the smaller motor.

tamalewagon
10-01-2005, 01:27 PM
I've got the 350 Merc Mag MPI in my 22' Howard. I'm running a tweeked 19" Revolution 4. My boat with 6 peeps and both tanks half full, it'll do about 60 mph. It's a heavy boat, but it's faster than my friend's 21 Hallett with at 454, but his boat is 15 years old.
When I do ski, I drag a while, but my weight has gone up about 30 lbs from when I bought my 65" ski 15 years ago, probably if my ski was longer I wouldn't drag as long.
The 350 is good engine if you don't want to go real fast or be real quick. My boat isn't a race boat and if I do go fast, I get the stink eye from the wife. And now with gas at over $3.00 a gallon, I don't really mind having the smaller motor.
Isn't that the truth!!! I'm about 30 lbs more than I was and should be. Geez...maybe I should be looking at the 525 to pull my fat ass out of the water!

tamalewagon
10-01-2005, 01:44 PM
I'm feeling you on this one. ;)
Hey Bob...what do you have under the hood on your Shockwave?

spectras only
10-01-2005, 01:45 PM
[b] The Scorp motor has all the good hard parts in it. The 6.2 has mostly cast parts.
The 6.2 has 320hp. The 377 Scorp has 360
The only thing that's cast are the pistons [ and block/heads of course :D ] . The 377 MX has steel crank , billet roller camshaft . The Scorp is way too much money for the forged pistons and a bit more lift :hammer2: . The MX is 320 HP versus Scorpion that's 350 at the prop. I turn 26P B1 props at 5100 rpm ,before the rev limiter cuts off . Tamalewagon , you won't be dissapointed choosing the 6.2 MX with 1.65 ratio drives ,especially for holeshots and waterskiing.
Or , order this block . It has good internals :)
http://www3.telus.net/spectrasonly/Img_1351.jpg
http://www3.telus.net/spectrasonly/Img_1355.jpg

tamalewagon
10-01-2005, 02:31 PM
[b]
The only thing that's cast are the pistons [ and block/heads of course :D ] . The 377 MX has steel crank , billet roller camshaft . The Scorp is way too much money for the forged pistons and a bit more lift :hammer2: . The MX is 320 HP versus Scorpion that's 350 at the prop. I turn 26P B1 props at 5100 rpm ,before the rev limiter cuts off . Tamalewagon , you won't be dissapointed choosing the 6.2 MX with 1.65 ratio drives ,especially for holeshots and waterskiing.
Or , order this block . It has good internals :)
http://www3.telus.net/spectrasonly/Img_1351.jpg
http://www3.telus.net/spectrasonly/Img_1355.jpg
Thank you Spectra O. VERY much. I'm not very well educated on the ratio drives but have heard the 1.5 (?) is a good choice too. What do you think?

tamalewagon
10-01-2005, 02:32 PM
The Shockwave is a jet, 21' LS with a 496.
I have a Warlock now too. It has twin 350MAG MPIs, Bravo Is, IMCO standoff boxes and 26p Bravo props.
WarlockBob???

spectras only
10-01-2005, 02:45 PM
TW , 1.5 is pretty standard for most boats with big blocks , the 1.65 lets you swing a bigger prop for good holeshot , towing skiers tubes etc with a small block or a 383 stroker. My boat weighs like a whale at 6880 lbs without peeps and gears , yet it pops out of the hole with the twin 377's ,and the acceleration from midrange to top is unreal .
We are probably going to use 1.5 or 1.65 ratio with this 572 engine , since it's going to be in a 35' hull weighing in ca 6000 lbs. Time will tell what ratio will work on that one .

tamalewagon
10-01-2005, 02:56 PM
TW , 1.5 is pretty standard for most boats with big blocks , the 1.65 lets you swing a bigger prop for good holeshot , towing skiers tubes etc with a small block or a 383 stroker. My boat weighs like a whale at 6880 lbs without peeps and gears , yet it pops out of the hole with the twin 377's ,and the acceleration from midrange to top is unreal .
We are probably going to use 1.5 or 1.65 ratio with this 572 engine , since it's going to be in a 35' hull weighing in ca 6000 lbs. Time will tell what ratio will work on that one .
Many thanks again...what pitch prop would you guess? 22 or 24? Sorry gang for all the questions, but I want to do my homework before I order the boat.

spectras only
10-01-2005, 03:18 PM
TW , John West at Ultra could tell you the best prop for a 22 Stealth with a small block . At 2900 lbs dry it should perform pretty good with a 377 imho . 320 hp at the prop should give you an honest 60mph . I could see a 24P Bravo 1 [ they're actually 23 P ] work well for a 22 stealth .
John might chime in on this one. Fuel economy for the 377 is between 8-9 gal/hour at 3000 rpm 20-22 gal at WOT .

termiteguy
10-01-2005, 03:26 PM
Many thanks again...what pitch prop would you guess? 22 or 24? Sorry gang for all the questions, but I want to do my homework before I order the boat.
i ran a 24 on mine once good top end not so good hole shot :lightsabe

rvrtoy
10-01-2005, 03:35 PM
22 would work very well and for skiing a 21 hi five will yank someone of my size out of the water very quick. No drowning!

SummitKarl
10-01-2005, 03:42 PM
you just can't beat SB strokers,,,,377 a fine motor, but the 383 is the more common stroker, got to drive a 21' essex with 350 ho and bravo 3, I dam near had to break out the paddles to get it to get it up on plane,I SWEAR!! it was 20 seconds or more.
then hopped off on to a 23' commander with a 377 and bravo one, BIG as in HUGE difference.
go for the stroker motor

ROZ
10-01-2005, 03:47 PM
Sorry for the hijack..
Karl, has the car in your avitar been in an accident before.. I think Ziggy posted a pick of it a long time ago, and it was wrecked.. I think I've seen that car before(year(s) ago)... Ever take it to Grand ave in esco?

spectras only
10-01-2005, 03:50 PM
Yes , the strokers have the torque advantage. A 383 stroker can have 450 footpound of torque .The 377 i think has around 425 footpound of torque , not too shabby comparing to what it's replacing [ 454cu ] .

all faded
10-02-2005, 08:51 AM
I have a 23p mirage with my scorpion on a 23ft kachina and I have no regrets. Gas is good, 68/69 in the ocean, and sounds and looks great. I also went with the weight factor over the 496. Randy

BADASS38CHEVY
10-02-2005, 10:35 AM
A friend of mine has a 25 stealth with the 377.His top speed was 62 on speedo not gps .

DJ Sound Technique
10-03-2005, 03:22 PM
I too have the 6.2 (377) Bravo 1 SS 25p 4 blade in my 21' Commander, it does just fine! Good hole shot and on plane quickly with a GPS speed of 62 mph on Silverwood along the dam. I have had it to 65 on the speedo once with just me and one other person in the boat. 45 -50 is a comfortable easy on gas cruise speed. No trouble pulling sikers, my buddy is 190 lbs and he pops up pretty quick

tamalewagon
10-04-2005, 08:39 AM
With the 377 not being made then the obvious choice would be the 383. Is the 383 and the 6.2 one in the same? Sorry, I previously was an outboard guy.

69 Elim
10-04-2005, 10:04 AM
377 is a virgin 350 block w/ a 400 crank. this is what a Merc 6.2 MX is.
383 is a 350 block bored .030 over w/ a 400 crank.
However, you can make a 377 from a 400 block w/ a 350 crank (but this isn't what we are talking about here).

tamalewagon
10-04-2005, 01:05 PM
377 is a virgin 350 block w/ a 400 crank. this is what a Merc 6.2 MX is.
383 is a 350 block bored .030 over w/ a 400 crank.
However, you can make a 377 from a 400 block w/ a 350 crank (but this isn't what we are talking about here).
Got it. :D

KLEPTOW
10-04-2005, 02:49 PM
[b]
The only thing that's cast are the pistons [ and block/heads of course :D ] . The 377 MX has steel crank , billet roller camshaft . The Scorp is way too much money for the forged pistons and a bit more lift :hammer2: . The MX is 320 HP versus Scorpion that's 350 at the prop. I turn 26P B1 props at 5100 rpm ,before the rev limiter cuts off . Tamalewagon , you won't be dissapointed choosing the 6.2 MX with 1.65 ratio drives ,especially for holeshots and waterskiing.
Or , order this block . It has good internals :)
http://www3.telus.net/spectrasonly/Img_1351.jpg
http://www3.telus.net/spectrasonly/Img_1355.jpg
I see someone else out there as been doing there home work on engines, would be real interested in what mods you do to that 572. Is that the 620 or the 720 version and have you explored putting a whipple on it?

spectras only
10-04-2005, 04:38 PM
It's only the 620 HP engine. 14 QT Dooley pan , Stellings dry exhaust with dump at the tips . We stay n/a until finding out if the boat gets on plane at all :) .Will have to take it easy on break in , because of the mang bronze guides gm put in. They should have put K-line bullet guides with rifle bore . It meant to be for a car , so can't complain to them :D .
Picture with Stellings
http://www3.telus.net/spectrasonly/Img_1360.jpg

KLEPTOW
10-05-2005, 08:27 AM
It's only the 620 HP engine. 14 QT Dooley pan , Stellings dry exhaust with dump at the tips . We stay n/a until finding out if the boat gets on plane at all :) .Will have to take it easy on break in , because of the mang bronze guides gm put in. They should have put K-line bullet guides with rifle bore . It meant to be for a car , so can't complain to them :D .
Picture with Stellings
http://www3.telus.net/spectrasonly/Img_1360.jpg
That looks SWEET !!!!
I was thinking of that motor, or putting a all aluminum motor together with a quad rotor Whipple. It all depends on the out the door price on the Chevy motor cause I have no intentions on paying GM 14 grand for that unit. I would like to hear how it runs after you get it dialed-in.

spectras only
10-05-2005, 09:11 AM
[b]. I would like to hear how it runs after you get it dialed-in.[/img]
Still have a lot of work finishing the boat that this engine goes in , but I'll have some clips posted here when we fire it up. Maiden voyage is planned for next april .

tamalewagon
02-06-2006, 11:09 AM
377 is a virgin 350 block w/ a 400 crank. this is what a Merc 6.2 MX is.
383 is a 350 block bored .030 over w/ a 400 crank.
However, you can make a 377 from a 400 block w/ a 350 crank (but this isn't what we are talking about here).
John or Steve...are both the 6.2mx and the 383 options for power on the 22 Stealth?

nhbuoy
02-06-2006, 11:36 AM
...if ya go with the BRAVO 3 outdrive with either "small block" you WILL get your arms ripped out...I can't believe no one else has told you this...

bigkatboat
02-06-2006, 11:42 AM
The Mercury Factory 383" motor is a factory rebuilt unit. The package is available with a Bravo1 drive, transom, and MPI motor complete. The price for this package is LESS than a new 377" package, and the 383" comes with a 2YEAR WARRANTY! I thought about putting one in one of my new 22' hulls and selling it at a lower price because of the low cost 383" package. The motor is rated at 325HP and it comes with 1.50 gear B1, trim pump, all the parts included in a new package. It's a deal! Also, stay away from the Bravo 3's! They are for heavy 'tubs' and drag down the top speed of a small fast hull. I work on drives every day and I would never use a B3 on a small fast hull, maybe a houseboat, but never a ski boat! B3 props cost "an arm and a leg" too!

Ziggy
02-06-2006, 11:47 AM
John or Steve...are both the 6.2mx and the 383 options for power on the 22 Stealth?
TW...I have the 377 in my 23 footer. Chose it for fuel efficiency over top end speed. 377 over the 350 for that little extra bottom end torque..better for skiing/tubing with the family.
Very happy with motor overall......but did have exhaust manifold gaskets go out rather early IMO.

spectras only
02-06-2006, 12:04 PM
Have the 383 stroker in this 22' Pachanga Bigkatboat is talking about . McDonald special ran it since last spring , without a hiccup :rollside: .BTW this engine is the first donor from merc that Bubba ordered through his dealership .
http://www3.telus.net/spectrasonly/Img_0778%20copy.jpg

tamalewagon
02-06-2006, 01:04 PM
The Mercury Factory 383" motor is a factory rebuilt unit. The package is available with a Bravo1 drive, transom, and MPI motor complete. The price for this package is LESS than a new 377" package, and the 383" comes with a 2YEAR WARRANTY! I thought about putting one in one of my new 22' hulls and selling it at a lower price because of the low cost 383" package. The motor is rated at 325HP and it comes with 1.50 gear B1, trim pump, all the parts included in a new package. It's a deal! Also, stay away from the Bravo 3's! They are for heavy 'tubs' and drag down the top speed of a small fast hull. I work on drives every day and I would never use a B3 on a small fast hull, maybe a houseboat, but never a ski boat! B3 props cost "an arm and a leg" too!
Thanks Bigkat...I had absolutely NO idea about the cost factor. Any idea of how much less the 383 package is than the 377? Thank you for your insight.

tamalewagon
02-06-2006, 01:05 PM
TW...I have the 377 in my 23 footer. Chose it for fuel efficiency over top end speed. 377 over the 350 for that little extra bottom end torque..better for skiing/tubing with the family.
Very happy with motor overall......but did have exhaust manifold gaskets go out rather early IMO.
Thanks Zig...pretty sure I'm going to go with 383 if Ultra offers it.

spectras only
02-06-2006, 04:56 PM
Tamalewagon , The 6.2 MX with Bravo 1 package is around 19.700 retail.
The 383 reman bravo 1 package is approx 12.900 retail. You get 5 more
horses with the 383 .It also also comes with hyper pistons .
377 >
http://www3.telus.net/spectrasonly/377%206.2%20MX

THOR
02-06-2006, 06:07 PM
Tamale,
I was interested in the very same 377 Scorpion with the whipple when I was shoping at Ultra. For the cost, you could save money and go with the 496 HO and have some really HP to deal with not to mention the additional cubic engines. Just my .02.

tamalewagon
02-06-2006, 07:37 PM
Tamalewagon , The 6.2 MX with Bravo 1 package is around 19.700 retail.
The 383 reman bravo 1 package is approx 12.900 retail. You get 5 more
horses with the 383 .It also also comes with hyper pistons .
377 >
http://www3.telus.net/spectrasonly/377%206.2%20MX
Spectras...many thanks for the costs. That's quite a difference and you get more horsepower. Unreal.

atomickitn
02-06-2006, 08:11 PM
for sure go with the either the 377 or merc's new 383 pack you wont be disappointed both are very good motors and both have very nice insides, the good stuff...... :)

bigkatboat
02-06-2006, 08:51 PM
If you are purchasing a new boat, ask the builder for 'your price'. If you want to buy one for your own use, I will sell you a complete 383 mag reman for $11,575.00. Retail is $12,976.00 plus $200.00 shipping. Price for a new 377 package will go up July 1st.

tamalewagon
02-06-2006, 09:08 PM
If you are purchasing a new boat, ask the builder for 'your price'. If you want to buy one for your own use, I will sell you a complete 383 mag reman for $11,575.00. Retail is $12,976.00 plus $200.00 shipping. Price for a new 377 package will go up July 1st.
Wow! Thanks Bigkat. I'll make the necessary inquiries.

termiteguy
02-06-2006, 10:29 PM
still havent made the final decision on the on that motor package remember
its not really all that important. j/k good luck on that decision. :crossx:

tamalewagon
02-07-2006, 10:39 AM
still havent made the final decision on the on that motor package remember
its not really all that important. j/k good luck on that decision. :crossx:
Actually it looks like I'm going to go with the 383. With 5 more horse's and several thousand less in the price, it seems like the logical choice.