I have a nitro 185 fs with force 120 on it
I go out at least 3 times a week and everything was ok
the boat will run 43 mph at 5100 rpm with full tank and me
last two times I can't get above 39 and the rpm will not go above
4800. The problem started when I got new gas and oil
not saying this is the problem but that's the only two things that have changed
I got 87 gas with no ethanol as always
I always used quicksilver premuim at 50:1 as recomended
this time I got qs premium plus oil and did not know
I was wondering to know what can cause this issue
I took the plugas cleaned them and tested with same results
2 plugs had little black stuff on the the other two were cleaner
I have changed the pump and impeller this spring
also did comp test an all are 120 to 125 on my tester which Jase been for 2 years
please help
I go out at least 3 times a week and everything was ok
the boat will run 43 mph at 5100 rpm with full tank and me
last two times I can't get above 39 and the rpm will not go above
4800. The problem started when I got new gas and oil
not saying this is the problem but that's the only two things that have changed
I got 87 gas with no ethanol as always
I always used quicksilver premuim at 50:1 as recomended
this time I got qs premium plus oil and did not know
I was wondering to know what can cause this issue
I took the plugas cleaned them and tested with same results
2 plugs had little black stuff on the the other two were cleaner
I have changed the pump and impeller this spring
also did comp test an all are 120 to 125 on my tester which Jase been for 2 years
please help