newbie on rock

[ErieRiverRunner08]

Ok so picked up very used 88 bayliner. First registered boat I must add. I had been out 5 times or so with diffrent problems almost each time. "welcome to world of OMC"
I hurry back to launch site for bills game sunday at 4 and caught some rocks bad... stalled boat as well as horrible slam. Got boat back still moved good and not much shimmy but. Inspection shows prop is done or needs rebuild. It was al. I have heard of checking propshaft for runout. What is runout.... and how do I check? Thanks

Yes new to boats and will get finder or depth all in time.

 

[boat1010]

Re: newbie on rock

That is just checking to see if the shaft is bent. If you have excess to a micrometer it will let ya know if it is bent.

 

[ErieRiverRunner08]

Re: newbie on rock

Yes I do I will head over to boat now pull the prop and see....

 

[ErieRiverRunner08]

Re: newbie on rock

Shaft seems fine but the skeg looks bent? Can i heat it up and try to bend back? I will try to take some pics in ghe morning

 

[ErieRiverRunner08]

Re: newbie on rock

Ok so i got prop fixed at a local marine shop... Put it on and went out on the river... Lost about 2000 rpm's .... Runs fine other than that.... Maybe goesthru a bit more gas but... Why such a loss? And obvious loss of top speed

 

[Bondo]

Re: newbie on rock

Lost about 2000 rpm's .... Runs fine other than that.... Maybe goesthru a bit more gas but... Why such a loss? And obvious loss of top speed

Ayuh,... My guess is,... You did some Internal Damage to the drive...

 

[stylesabu]

Re: newbie on rock

the lower drive is like a rear diff. in a car. it works or it doesn't. is there noise that wasn't there before?unless a bearing is binding there isn't any reason to drop rpm unless prop wasn't put back to original specs. i would try another prop first.same size as old one

 

[hwsiii]

Re: newbie on rock

Erie, I agree with Bond-o, even if the prop shop used the wrong pitch block to fix your prop it is almost impossible to change the RPM by 2,000 RPM. I would look for the problem somewhere else than the prop. But styles idea is not bad, try another prop close to the same pitch and see what RPM you get.


H