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I recently purchased a 27' Tahiti jet boat with a berkley drive. I built up a 454 and "winged it" on the cooling system. First time out the engine over heated so I assume I'm doing something wrong. Does anyone have a diagram of how these things should be plumed. I have below water exhaust.
Thank you,
Neils
A 27' Jet? Biggest I've ever seen to date was Poon Tang III at 26'.
RD
Originally posted by RiverDave2:
A 27' Jet? Biggest I've ever seen to date was Poon Tang III at 26'.
RD
I'm new to boating. I took a measurement from front (stern?) to the diverter of the back of the jet which was 27'.
Neils
Boerman, welcome to the boards!
The standard plumbing for a jet with log-style thru-transom exhaust is illustrated in this pic I borrowed from Liquidaddiction.net (http://www.Liquidaddiction.net)
http://www.liquidaddiction.net/images/logs.jpg
Water enters from pump and goes to a "T" where it splits off and enters the exhaust logs(not the outlet risers!). Water is warmed in logs (also cools the logs) and then exits logs and enters at what would have been the water pump mounting point. It circulates thru block, exits at T-stat housing and then out via the exhaust risers.
Hope this helps!
[This message has been edited by OLDSQUIRT (edited May 29, 2002).]
Originally posted by Boerman:
I'm new to boating. I took a measurement from front (stern?) to the diverter of the back of the jet which was 27'.
Neils
Boerman,
Front = Bow
Back = Stern
Left = Port
Right = Starboard
Transom = (tryin to figure a good way to word this) The flat part where your jet is attached to.
Boats are "typically" measured from the tip of the bow to the end of the transom. You don't include the actual propulsion unit itself (although a couple of pretty CHEESEBALL mfg's will do it anyways..) <-- sorry about that a little personal "grudge" there. http://free.***boat.net/ubb/wink.gif
RD
Originally posted by RiverDave2:
Boerman,
Front = Bow
Back = Stern
Left = Port
Right = Starboard
Transom = (tryin to figure a good way to word this) The flat part where your jet is attached to.
Boats are "typically" measured from the tip of the bow to the end of the transom. You don't include the actual propulsion unit itself (although a couple of pretty CHEESEBALL mfg's will do it anyways..) <-- sorry about that a little personal "grudge" there. http://free.***boat.net/ubb/wink.gif
Thank you for the quick lesson. I took another mensurement from bow to end of transom which is 24'.
RD
Originally posted by OLDSQUIRT:
Boerman, welcome to the boards!
The standard plumbing for a jet with log-style thru-transom exhaust is illustrated in this pic I borrowed from Liquidaddiction.net (http://www.Liquidaddiction.net)
It is cooling!! I set the cooling system to the configuration you attached. The engine held at ~160 Deg. after 15 minutes at 4k RPM. Much better thatn the previous 190 Deg. Thank you,
Neils
http://www.liquidaddiction.net/images/logs.jpg
Water enters from pump and goes to a "T" where it splits off and enters the exhaust logs(not the outlet risers!). Water is warmed in logs (also cools the logs) and then exits logs and enters at what would have been the water pump mounting point. It circulates thru block, exits at T-stat housing and then out via the exhaust risers.
Hope this helps!
[This message has been edited by OLDSQUIRT (edited May 29, 2002).]
What's wrong with 190 deg? An engine should run right in that range. Or was it getting hotter than that?
Originally posted by mister460:
What's wrong with 190 deg? An engine should run right in that range. Or was it getting hotter than that?
At lowest ~190 Deg. If I ran it up to 4k RPM, temp would increase to ~210.
Do you know what a safe RPM range is for a basically stock 454. My last run out, which was short, it took about 4k rpm to get the boat to plane.
Neils
It should run 5500-6000 easy. Yeah, 210 is kinda gettin' up there. And I'm not so sure it sure take 4k to get on plane. Maybe your pump is a little loose.