One last question guys. My boat has three cutless bearings per shaft and a dripless packing gland. The prop is VERY hard to turn by hand suggesting I'm wasting fuel. My diver tells me the other Hatts in the basin take much less effort to spin the wheels while in the water. I've probably put 800 hours on her this way, and the PO probably had even more. I don't see any issues like hot cutless etc. Should I be concerned, and if so where should I look.
Bob
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Thread: Stiff prop shaft
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Stiff prop shaft
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Re: Stiff prop shaft
Does the clutch drag at all? Do the shafts spin some cold at idle while in neutral? You may not have tight cutlass bearings at all, just transmissions with tired springs on the clutch packs.
Sky Cheney
1985 53EDMY, Hull #CN759, "Rebecca"
ELYC on White Lake--Montague, MI
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07-30-2008 08:04 PM #3
Re: Stiff prop shaft
This could be the cause.
Have Fun Boating
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Re: Stiff prop shaft
Check the alignment at the transmission coupling. The engine may be out of alignment in relationship to the centerline of the propshaft.
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07-30-2008 09:06 PM #5Senior Member
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Re: Stiff prop shaft
Bobk...above posts are good advice. maybe somebody used a wrong size cutlass bearing....
Any vibration?....
A good way to start is to disconnect the shaft coupling from the transmission coupling and see if the shaft when disconnected turns much more easily than when connected ....this can be done in the water...if you are uncertain, disconnect the other engine shaft and compare twist resistance....
Several years ago I noted my port shaft was more difficult to turn than my starboard; yet when I checked it again at the end of that season, it was fine...never did figure that out....maybe rope/cord wrapped around/in a cutlass....Rob Brueckner
former 1972 48ft YF, 'Lazy Days'
Boating isn't a matter of life and death: it's more important than that.
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Re: Stiff prop shaft
Funny, cuda's usually dont do that to me.....
Captned
MBMM
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Re: Stiff prop shaft
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Re: Stiff prop shaft
If the shafts turn easily when detached from the trans, then you may have an alignment issue. If the alignment checks out, then the resistance is within the transmission. I had this problem with my Allisons. One of them would drag while idling in neutral. Upon disassembly we found the 8 (I think) springs that release the clutch plate were compressed and needed replacement. Once we put the new springs in, we no longer had shafts that spun while idling in neutral and they were much easier to spin by hand with the engines shut off.
Sky Cheney
1985 53EDMY, Hull #CN759, "Rebecca"
ELYC on White Lake--Montague, MI