Merc. 500-50hp

[izuizme]

OK I'm back on the water motor is running,starting up fine after carb rebuild,<br />& 4 new coils.But still having an old problem, at times while running at 3,000 to 4,000 rpm the motor surges real high and lose's mid to top end power creating an unsafe condition in heavy boat trafic,please advise

 

[mellowyellow]

Re: Merc. 500-50hp

is your prop spun/slipping?<br />good luck,<br />M.Y.

 

[izuizme]

Re: Merc. 500-50hp

how would I determine that..???

 

[andrewkafp]

Re: Merc. 500-50hp

I would guess that you would have it on the trailer and in gear. Grab prop and try to turn it. If it turns and the shaft doesn't, then it's spun.

 

[izuizme]

Re: Merc. 500-50hp

OK, I tried turning prop with it in gear,and the entire motor turned over..what else/next ??

 

[andrewkafp]

Re: Merc. 500-50hp

Try spanner on the nut to stop it turning over.<br />Sounds pretty firm to me if it can turn over the engine with no slip ???

 

[Mikael-Block]

Re: Merc. 500-50hp

hi izuizme<br />The best way to tell is to mark the hub and the prop with paint. They must still be aligned after <br />you have had the boat sailing<br /> /<br />(/)<br />/<br /><br />Mikael

 

[izuizme]

Re: Merc. 500-50hp

Mikael-Block that sound like the best way to determine if the prop is slipping I'll ive it a try and post my reply...thanks for the tips fellas