First of all I want to thank all who contribute to these forums. You have helped me immensely throughout the years through some truly frustrating and puzzling issues. And now, I have one that tops them all so far, and hope you can help shed some light.
The issue started last season. I was topping out at 4400 RPM's as I am now, then I had a sleeve in the cylinder slip on me. I had the engine rebuilt and the sleeve is now pinned. Here is a list of what has been replaced and I am still having the same issue.
All bearings in the engine and a new piston in the cylinder that had the sleeve turn
All fuel and air injectors that were out of spec were replaced - the rest were cleaned.
Oil pump
Air Filter
Impeller
water pump gaskets
gear oil
130 degree Thermostats (both have been tested and pop at 130 degrees)
Fuel was drained and has been replaced with non ethanol fuel.
Fuel pump seal
Carbon Fiber reeds replaced the old metal reeds
fuel line and bubble
Battery is a brand new redtop
What has been tested:
Compression 100-105 on all 6 cylinders
Cylinder miss fire test - all were firing
Air/Fuel compression read 84 and 94
water PSI is at 2.2 at idle and around 10-15 when at 4400 RPM
Temps are good (get up to 130-134 then cools down to 118 or so - had a problem where there was something stuck in the poppet on one thermostat so it was open all the time but has been corrected)
Throttle, hot foot, and butterfly have been checked.
Boat is currently in break in period with about 90 minutes on the motor - it had 580 before the rebuild.
I have kept the trim down all the way and only get 4200 RPM. Raising the trim (only did it once) gets me to 4400-4500 @ about 44 MPH
Before these problems started the boat ran normal and got to about 65 MPH
I talked to Mark at marksprops.com and he said theres no way it is a prop problem, it is an engine issue.
My mechanic's reader is throwing two errors:
Oil Lvl ckt Hi
Sea temp ckt Hi
I am not a mechanic, but am mechanically inclined can do most small things myself. I'm sure I don't have to tell you the frustration and stress this has caused thus far, so I won't. I appreciate any help you all can provide.
The issue started last season. I was topping out at 4400 RPM's as I am now, then I had a sleeve in the cylinder slip on me. I had the engine rebuilt and the sleeve is now pinned. Here is a list of what has been replaced and I am still having the same issue.
All bearings in the engine and a new piston in the cylinder that had the sleeve turn
All fuel and air injectors that were out of spec were replaced - the rest were cleaned.
Oil pump
Air Filter
Impeller
water pump gaskets
gear oil
130 degree Thermostats (both have been tested and pop at 130 degrees)
Fuel was drained and has been replaced with non ethanol fuel.
Fuel pump seal
Carbon Fiber reeds replaced the old metal reeds
fuel line and bubble
Battery is a brand new redtop
What has been tested:
Compression 100-105 on all 6 cylinders
Cylinder miss fire test - all were firing
Air/Fuel compression read 84 and 94
water PSI is at 2.2 at idle and around 10-15 when at 4400 RPM
Temps are good (get up to 130-134 then cools down to 118 or so - had a problem where there was something stuck in the poppet on one thermostat so it was open all the time but has been corrected)
Throttle, hot foot, and butterfly have been checked.
Boat is currently in break in period with about 90 minutes on the motor - it had 580 before the rebuild.
I have kept the trim down all the way and only get 4200 RPM. Raising the trim (only did it once) gets me to 4400-4500 @ about 44 MPH
Before these problems started the boat ran normal and got to about 65 MPH
I talked to Mark at marksprops.com and he said theres no way it is a prop problem, it is an engine issue.
My mechanic's reader is throwing two errors:
Oil Lvl ckt Hi
Sea temp ckt Hi
I am not a mechanic, but am mechanically inclined can do most small things myself. I'm sure I don't have to tell you the frustration and stress this has caused thus far, so I won't. I appreciate any help you all can provide.