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Have a 1986 ProV 150. Boat was extremely hard to get up on plane. Had carbs rebuilt. Upon rerunning, it came right up on plane and ran good. After 10 minutes, it restricted itself to 4200 or so RPM. No warning buzzer sounded. (thought buzzer may have been bad) I then thought possibly overheating. I then installed a new impeller and thermostats. Took boat out today, ran great for several long runs. Motor then procedded to slowly lose RPM's down to around 4600 or so after about an hour of running.
Seems to idle smooth, cant figure it out. Dont think it has a throttle position sensor. It almost feels like its not opening up all the way. Checked the throttle linkage, seems to be working OK. Any ideas or tests to suggest would be great. Thanks for any input, James Aldridge
Seems to idle smooth, cant figure it out. Dont think it has a throttle position sensor. It almost feels like its not opening up all the way. Checked the throttle linkage, seems to be working OK. Any ideas or tests to suggest would be great. Thanks for any input, James Aldridge