Yamaha 150 high rpm no power at prop

[danielp6378]

I've got a 1991 yamaha. Been great, but today was running and it just shut down. I was at full speed, and it just slowed down. Good water pressure, no alarms.

It will run 1200 rpm, and then when I give it more power it revs high, but no power. Could this be the sheer pin? Is it a lower unit issue?

Any idea what kind of expense I'm looking at?

Also, whats the bes shop manual to buy for one of these.

Thanks for any help.

Daniel

 

[danielp6378]

Re: Yamaha 150 high rpm no power at prop

Was running strong, and then nothing. The engine runs great, but no power at the prop.

It reminds me of a clutch going out on a car, high rpms, but no power.

Will run fine at 12 to 1500 rpms, but that's it.

Could this be a sheer pin issue or something worse?

No alarms, good water pressure, everything seems normal.

Thanks for any help,

Daniel

 

[grid]

Re: Yamaha 150 high rpm no power at prop

The shearpin went the way of the dinosaur for larger engines. You have a rubber hub in your proip which has probably sheared, or spun.

 

[sar3195]

Re: Yamaha 150 high rpm no power at prop

Sounds like a spun prop to me also.

 

[deejaycee_2000]

Re: Yamaha 150 high rpm no power at prop

you spun the bush on your prop .... take your prop off, take it to a prop shop and they will press in a new bush, it is cheap and easy .... your motor is fine ... these things happen ...

 

[danielp6378]

Re: Yamaha 150 high rpm no power at prop

thanks for the reply guys, saved me some worry.

Another question: What is the best shop manual producer for my engine? Besides Yamaha of course.

Thanks,
Daniel