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Old 02-28-2005, 01:50 PM
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jayderwin1 jayderwin1 is offline
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Shaft seal woble

on my 86 were the shaft comes thru the boat that water tight seal kind of shakes alittle bit but the shaft look like it is straight. my question is does this seal kind of wobble any way, or is my shaft slightly bent.
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Old 02-28-2005, 03:30 PM
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jayderwin1 jayderwin1 is offline
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this is when it's in gear at idel, coud it be from the shake of the motor at low RPM?
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Old 02-28-2005, 09:53 PM
Storm861triple Storm861triple is offline
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Your propshaft is slightly bent. If you care, pull it out and throw it in a lathe or some such device to spin it from each end. Put a dial indicator in the shft in the middle. I believe that max run out spec is .003".

-Tom
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Old 02-28-2005, 10:40 PM
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With the motor bolted into fiberglass stringers and not rubber motor mounts, there isn't going to be a whole lot of motor shake.
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  #5  
Old 03-02-2005, 09:28 AM
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jayderwin1 jayderwin1 is offline
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Is there anyway to straighten it out or do I have to buy a new one also will it mess up the boat if I do not fix the problem, the wobble is very little at idle speed I have not seen it at cruising speed
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Old 03-02-2005, 01:28 PM
Storm861triple Storm861triple is offline
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There is a way to find out if it acceptable or not and I out lined that method above. If you want ot know if it's in spec that's how to do it.

Realistically, I've seen boats w/some severly bent sh!t that have been operating fine for years. I wouldn't accet that in MY boat, but you can "Get away" w/a lot.

You're probably "Fine", but there is a spec and a method to check if you really want to know.

I've never straighted a propshaft for in Inboard, but I hve for Out boards. I bet you could do it. When mine was bent though I bought a new one.
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Old 03-02-2005, 01:45 PM
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thanks for the info. my prop shaft doesn't seem to be bent that bad so i will stick with it. how much did it cost to replace the shaft?
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Old 03-02-2005, 02:05 PM
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BriEOD knows of a business that may be able to straighten things up for you. Probably run about $100 or so. Replacing the shaft will cost more than double that, even if you do the installation yourself.
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Old 03-02-2005, 08:22 PM
Storm861triple Storm861triple is offline
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Yep. My shaft was $300.00. My PROP shaft that is.

If I were doing it over, I'd straighten the old one myself, but I do have the resouces to do that (Lathe, press, dial indicator, etc.)

-Tom
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