"I have a 3.7L Mercruiser engi
"I have a 3.7L Mercruiser engine in my boat that I have put much TLC into. I just took it out for the second time this year after replacing the water pump in the drive. Temp looks good, as well as oil press. with about 180 degrees F @ WOT (4,200RPM) 35mph. HOWEVER, not long after going full throttle the engine starts making a rattling noise. Any idea what this could be? I'm hoping its not a valve problem. Maybe timing chain? The guy I bought the engine from said the cyl-head was just rebuilt.
Also noticed after a high speed run my engine runs erratically at idle, but I know that the rochester carb is in desperate need of an overhaul.
Any help on this matter much appreciated. Thanks!
-Jim"
"I have a 3.7L Mercruiser engine in my boat that I have put much TLC into. I just took it out for the second time this year after replacing the water pump in the drive. Temp looks good, as well as oil press. with about 180 degrees F @ WOT (4,200RPM) 35mph. HOWEVER, not long after going full throttle the engine starts making a rattling noise. Any idea what this could be? I'm hoping its not a valve problem. Maybe timing chain? The guy I bought the engine from said the cyl-head was just rebuilt.
Also noticed after a high speed run my engine runs erratically at idle, but I know that the rochester carb is in desperate need of an overhaul.
Any help on this matter much appreciated. Thanks!
-Jim"