Been having the above problem now for quite some time. Inititially thought it was the maximum RPM governor. However adjusted that today and still could not get the engine to rev higher than 2,100RPM when the engine is under load.
Under no load the engine is happy to rev up to 3,500RPM where it hits the maximum RPM governor (which is actually just an adjustable bolt on the throttle). However as soon as the engine is in gear it will only go up to 2,100 RPM. You can advance the throttle further however it does not change anything.
I also do not think it is the wrong propeller as the previous owner measured the prop and took it to a specialist and the advice was that it was about the right size and pitch for the boat.
The engine is a 98HP Nissan SD33 diesel. Maximum RPM is 4,000RPM and maximum continuous RPM is 3,200.
The engine should be easily able to get the boat up to hull speed (7.5kts) as the recommended engine for this boat is 50-80HP. At 2,100RPM the boat is doing 6 kts. I reakon if I can get the RPM up to 3,000RPM the boat should be pretty close to hull speed.
Anyone have any ideas why the engine will not rev above 2,100RPM?
Ilenart
Under no load the engine is happy to rev up to 3,500RPM where it hits the maximum RPM governor (which is actually just an adjustable bolt on the throttle). However as soon as the engine is in gear it will only go up to 2,100 RPM. You can advance the throttle further however it does not change anything.
I also do not think it is the wrong propeller as the previous owner measured the prop and took it to a specialist and the advice was that it was about the right size and pitch for the boat.
The engine is a 98HP Nissan SD33 diesel. Maximum RPM is 4,000RPM and maximum continuous RPM is 3,200.
The engine should be easily able to get the boat up to hull speed (7.5kts) as the recommended engine for this boat is 50-80HP. At 2,100RPM the boat is doing 6 kts. I reakon if I can get the RPM up to 3,000RPM the boat should be pretty close to hull speed.
Anyone have any ideas why the engine will not rev above 2,100RPM?
Ilenart