Looking for help on a pontoon I recently purchased. I am running a 14 X 10p 3 blade prop. Initially at initial WOT the motor would get to ~5k rpm then bog down to under ~4k rpm. After I exhausted my attempts I had a mechanic look at it and he ended up cleaning/checking the fuel pump and VST. He also had the 4 injectors cleaned. After this work the motor now will hold somewhere between 4,800 - 5,200 rpm somewhat consistent meaning that it will fluctuate over some time between this range but really unnoticeable since the change is over a period of time. The result of this range puts me at a top speed (GPS) of 12-13 mph at WOT. Based on other threads that I have read with owners of a 21 Suntracker with the same engine typically report being able to hold 6k rpm and hold around 18mph. In neutral I can rev the engine to 6k+ with no issues. Here is what has been done.
New prime bulb
Fuel filters cleaned
Fuel pumps checked
VST checked
Plugs changed (although the originals where Champion and the replacements were equivalent NGK, not sure if that makes a diff?)
Injectors cleaned
Looking for feedback on what I could look at next. Any help would be greatly appreciated.
Thanks!
New prime bulb
Fuel filters cleaned
Fuel pumps checked
VST checked
Plugs changed (although the originals where Champion and the replacements were equivalent NGK, not sure if that makes a diff?)
Injectors cleaned
Looking for feedback on what I could look at next. Any help would be greatly appreciated.
Thanks!
Last edited:
