prop shaft

david_r

Lieutenant Junior Grade
Joined
Aug 11, 2008
Messages
1,118
what does it take to bend a prop shaft?

i just got a new parts motor and the guy i bought it from said it was locked up when he got it (motor).

now i have all the pieces and the prop doesnt look that bad heres a few pics

newpartsmotorpieces001.jpg


newpartsmotorpieces010.jpg


newpartsmotorpieces008.jpg


newpartsmotorpieces009.jpg



i have pointed out the worst spots on the prop............but they seem insignificant as far as prop bending hits........am i wrong?

i cant find my dialindicator and the tool truck i like wont be in town for a couple of days wo heres what i did:

i took my micrometer and put one end against the trim tab area then i put the other end in the hole at the end of the prop shaft. with the lu in a vise i had my son turn the drive shaft (while in gear of course) and i kept rubbing the adjustment wheel on the mic to make sure it stayed against the one side of the hole.......................it appears to have moved .04063" in one revolution.

is this within specs?..........is my test accurate enough?.........should i just suck it up and wait to buy a new dialindicator?
 

david_r

Lieutenant Junior Grade
Joined
Aug 11, 2008
Messages
1,118
Re: prop shaft

ok im a goob one of the pics was the controls he gave me..........which hs no key nor warmup lever...anyways

newpartsmotorpieces007.jpg
 

david_r

Lieutenant Junior Grade
Joined
Aug 11, 2008
Messages
1,118
Re: prop shaft

apparently my idea for using a mic to measure trueness wasnt so hot.........should have used a dial indicator.

i installed it on my motor and when i spun the prop by hand it wobbled about 1/4 inch.......maybe more.

as for the rest of the pieces----i have 2 of everything :D.
 

Dhadley

Supreme Mariner
Joined
Feb 4, 2001
Messages
16,978
Re: prop shaft

If you put that prop on the hub may be off center.
 

david_r

Lieutenant Junior Grade
Joined
Aug 11, 2008
Messages
1,118
Re: prop shaft

i wish that were true......i used my prop.

after i switched the lu back i thought the same thing.......but on my lu the prop spun true....both props.......its just that the damage appeared minor to me.


i do have another q:

i have set up auto rearends before.

when i look at the parts diagram i only see 2 shims....and they are at the top...none near the prop shaft as far as i can tell.

do these things just bolt together or am i going to need 20 various sized shims to get the proper gear mesh and backlash?


can i take the prop shaft from mine add a new bearing and be done?........i priced the new prop shafts--$456. crazy high!!


my lu is good with the exception of a bent and mostly missing skeg.......the guy i bought the boat from ruined the old lu and had this one laying beside the boat......it was still bolted to the other leg ...
he told me he got a good deal at $300 and that everyone else wanted min of $450 ------- and i said yeah but look at the skeg......he claimed he didnt notice.
 
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