3800 rpm wall
#23
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I just ran this thing on the trailer and it runs up to 4800 smooth as silk. Hits the rev limiter at 4900. Runs fine not under a load. I'm going to put a fuel pressure gauge on it and run it in the water to see exactly what I'm getting under load at WOT, also taking some spray to squirt in the intake to see if RPM's go up to try and narrow it down to fuel pump problem.
Last edited by Toolman62; 10-21-2013 at 04:23 PM.
#24
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I just ran this thing on the trailer and it runs up to 4800 smooth as silk. Hits the rev limiter at 4900. Runs fine not under a load. I'm going to put a fuel pressure gauge on it and run it in the water to see exactly what I'm getting under load at WOT, also taking some spray to squirt in the intake to see if RPM's go up to try and narrow it down to fuel pressure problem.
#25
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Hose wide open with deep water pickup! Temp runs around 170. Plus just bounced the rev limiter, didn't hold it at a high RPM very long
Last edited by Toolman62; 10-21-2013 at 04:24 PM.
#27
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I just ran this thing on the trailer and it runs up to 4800 smooth as silk. Hits the rev limiter at 4900. Runs fine not under a load. I'm going to put a fuel pressure gauge on it and run it in the water to see exactly what I'm getting under load at WOT, also taking some spray to squirt in the intake to see if RPM's go up to try and narrow it down to fuel pump problem.
No fuel issue is going to cause that. The engine needs to come apart.
#28
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Griff I agree about the rebuild!! I'm going to do my own leak down test to confirm results from service. If this is the case then I think that I'm just running out of HP because of loosing power from the week cylinders. 57 mph at 3800 with the equivalent of a 5.5L in a 4200 lb boat running a 23P prop isn't to bad. She should come up and be happy with all cylinders working again
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