Mercruiser Engine Problem
01-10-2006 | 07:40 AM
#41
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Joined: Jun 2005
Posts: 8,407
Likes: 797
From: Central IL
Re: Mercruiser Engine Problem
As other's have already mentioned here, my first guess would be a weak fuel pump. Hook up a fuel pressure gauge and take it out so you can see what it is reading under a load. I recently had the same problem. Fuel pressure was 40+ PSI at idle and dropped down to about 17 PSI as I started to plane the boat out. Good luck! I agree that the IAC would be a very unlikely culprit, but stranger things have happened!! Also, check the fuel line from the tank to the fuel filter housing and make sure it has not developed a soft spot and is collapsing under load.
Last edited by Knot 4 Me; 01-10-2006 at 07:52 AM.
01-10-2006 | 12:55 PM
#42
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Joined: Apr 2002
Posts: 3,086
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Re: Mercruiser Engine Problem
My uncle had this problem 2 years ago, the Merc mechanic went through everything in the end it turned out to be plug wires. I'm still at a loss but the bad wires seemed to mess up the computer.
Last year the other motor started surging at idle, still haven't fixed that one.
If it were me I would be taking the advice the board has given and start swapping components from one motor to the other.
Last year the other motor started surging at idle, still haven't fixed that one.
If it were me I would be taking the advice the board has given and start swapping components from one motor to the other.
01-10-2006 | 02:35 PM
#43
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Joined: Mar 2001
Posts: 2,558
Likes: 1
From: ohio
Re: Mercruiser Engine Problem
Originally Posted by GOODT
ok here we go first its not my boat read the post....
second, I dont survey boats I fix them....
third..... i THINK first before I tell someone something....
fourth.... after 25 yrs I think ive proboly been doing this longer then you....
if I wanted to be mean and dis you I would of told you to eat s*it and die
I have certs from merc, omc and volvo and you...???????
oh and no im not a hot shot just 42 yrs old been doing hp boats for a long time and no im not always right just not wrong often and dont like being put down when im not wrong if i am then go for it.. if your not 100% sure when you say something then say I think the iac only controls idle. dont mke it sound like you know 100% that im wrong when im not!!!!!!!!
I take alot of pride in my work and try not to be wrong
I dont survey boats
you do
do you want me to say more
second, I dont survey boats I fix them....
third..... i THINK first before I tell someone something....
fourth.... after 25 yrs I think ive proboly been doing this longer then you....
if I wanted to be mean and dis you I would of told you to eat s*it and die
I have certs from merc, omc and volvo and you...???????
oh and no im not a hot shot just 42 yrs old been doing hp boats for a long time and no im not always right just not wrong often and dont like being put down when im not wrong if i am then go for it.. if your not 100% sure when you say something then say I think the iac only controls idle. dont mke it sound like you know 100% that im wrong when im not!!!!!!!!
I take alot of pride in my work and try not to be wrong
I dont survey boats
you do
do you want me to say more
01-10-2006 | 05:30 PM
#45
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Joined: Aug 2004
Posts: 1,560
Likes: 3
From: louisville, kentucky
Re: Mercruiser Engine Problem
Originally Posted by stecz20
i had nothing to do with this thread... do i still get in trouble???
01-10-2006 | 05:51 PM
#47
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Joined: Jul 2001
Posts: 16,435
Likes: 2
From: USA
Re: Mercruiser Engine Problem
[QUOTE=Edward R. Cozzi] YOU MIGHT AS WELL HAVE SUGGESTED HE TEST THE WINDSHIELD WIPER SWITCH!
QUOTE]
Funny You should say that......... It's a long story that I'll have to tell you sometime
QUOTE]
Funny You should say that......... It's a long story that I'll have to tell you sometime
01-11-2006 | 11:01 AM
#49
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Joined: Jan 2004
Posts: 3,682
Likes: 4
From: Boca Raton, FL
Re: Mercruiser Engine Problem
[QUOTE=CAP071]
I would love to hear that sometime, provided I can share my stories with you!
Originally Posted by Edward R. Cozzi
YOU MIGHT AS WELL HAVE SUGGESTED HE TEST THE WINDSHIELD WIPER SWITCH!
QUOTE]
Funny You should say that......... It's a long story that I'll have to tell you sometime
QUOTE]
Funny You should say that......... It's a long story that I'll have to tell you sometime
