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Forum: General Q & A

06-30-2005, 02:34 AM

Replies: 5

Timing problems on 7,4 MPI

Views: 6,121

Posted By sorrento454

Re: Timing problems on 7,4 MPI

Thank you very much Dave.
I´m going to test this asap and I will let you know the result. They say that one problem doesn´t come alone and yesterday I found out that the engine is taking in water in...

Forum: General Q & A

06-26-2005, 01:30 AM

Replies: 5

Timing problems on 7,4 MPI

Views: 6,121

Posted By sorrento454

Re: Timing problems on 7,4 MPI

I have made some more testings and found out that with shift in neutral position the timing advance will increase to 31 degrees at 4000 rpm. We went then again out driving and found out that the...

Forum: General Q & A

06-16-2005, 03:32 PM

Replies: 5

Timing problems on 7,4 MPI

Views: 6,121

Posted By sorrento454

Timing problems on 7,4 MPI

I was earlier asking for advice on this forum due to the lack of power in my engine and now I´ve found something what could be the explanation. I was able to use a Mercruiser tester for checking up...

Forum: General Q & A

06-07-2005, 06:40 AM

Replies: 5

Merc 7,4L MPI -99, more horsepower needed

Views: 935

Posted By sorrento454

Re: Merc 7,4L MPI -99, more horsepower needed

I had alpha (1:1,36) with 15" prop. Max speed was then 37 knots. When I changed engine the alpha was replaced with bravo1 (1:1,5). I know that the bravo will slow the boat a slightly but the...

Forum: General Q & A

06-06-2005, 08:06 AM

Replies: 5

Merc 7,4L MPI -99, more horsepower needed

Views: 935

Posted By sorrento454

Merc 7,4L MPI -99, more horsepower needed

I´ve a sea ray 25 sorrento and exchanged the engine from a 454 (330hp) to 7,4LMPI and the engine have less power and consume more fuel! Do anybody have similar experiences with the engine? Any...

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