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Shaft straightening

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firepiper

Contributing Member
"Not sure of where to put this

"Not sure of where to put this, but, here looked good. I have a vibration at low speed from my starboard side. I checked the alignment, feeler guage, pima, and had the prop checked at the shop. Still there. I'm wondering if it could be the shaft. I have a tiny wiggle at the shaft log when I can feel the vibration. This has been an on going issue. Cutlass bearing is also new, and good. This all goes away at higher rpms.....can a shaft be off causing this? and can they be straightened? any thoughts? thanks
Fire Escape
1987 35' Luhrs Alura
1986 Twin Crusader 454,FWC,MPI,VD 1.91"
 
"could it be the shaft - yes.

"could it be the shaft - yes. but could also be worn out or loose engine mounts. Could also be a worn shaft - new cutlass bearings can't help there.

A good prop shop should be able to check the shaft and straighten it, if needed.

MPI - as in multi-port? If so, who did it and what was used?"
 
I looked at them....rebuilt bo

I looked at them....rebuilt both engines for what one MPI cost - installed.

Do you like it? How was it to tune?

Any economy improvement to speak of?
 
"love them. Bought used crusad

"love them. Bought used crusaders, already had them installed. Easy tune , run great."
 
"That's they way to get th

"That's they way to get them.

On the alignment, did you check to see if the shaft was centered in the log?"
 
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