defective prop?

[jimedac]

Can a defective prop drop my wot rpms from 4300 to 3000?


Thanks jimedac

 

[EddiePetty]

Re: defective prop?

....amoung other things!!!!

A few more specifics might just get you a factual answer!!!!!

 

[jimedac]

Re: defective prop?

I changed spark plugs then took my boat out for a test drive it ran fine I anchored at the beach on the way back I tried opening it up and couldn't get above 3000 rpmsm
I have been all through the engine without finding the problem than I noticed the prop has fresh nicks on all 3 blades. Could this be the problem?

 

[Bondo]

Re: defective prop?

I have been all through the engine without finding the problem than I noticed the prop has fresh nicks on all 3 blades. Could this be the problem?

Ayuh,... If it was bent up enough to Add 6" of pitch or more,.... Maybe...
But,... I'd think it'd be Vibrating' to beat 'ell...

Have you verified the fuel supply, 'n pressure,..??

 

[jimedac]

Re: defective prop?

I have 39 psi on the rail and less than 2inHG suction b4 the filter

 

[EddiePetty]

Re: defective prop?

I have 39 psi on the rail and less than 2inHG suction b4 the filter

...just 'cause ya' got the pressure doesn't mean ya' got the VOLUME !!!!!

 

[sstocker31]

Re: defective prop?

Did you gap the plugs properly, how about the plugs are they the correct ones....maybe a wire is off, or you switched two around.....

 

[Robbabob]

Re: defective prop?

I would think a damaged prop would raise the rpms and lower your speed. As Bond-o indicated, you'd have to of added pitch through the damage -- not likely if you didn't feel such an impact.

I'm still learning, so my input is from my gut, not exerience.

Good luck!