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Message |
    
paul gomez,jr.
New member
Username: pago619
Post Number: 1
Registered: 10-2009
| | Posted on Wednesday, October 07, 2009 - 01:05 pm: | 
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I have a 1991 bayliner with a 150 h.p. Force that i cant get the flywheel to turn on. I tried to turn it with a wrench right on the flywheel nut but it seems to be jamming up on something. I had a mechanic take a look at it and he says it has to be torn down further to try and find the problem. Well, i've torn it down some more but haven't seen anything obvious yet. Also, I still have to actually split the block and crank. Do I first have to pull bearing? Any suggestions would be greatly appreciated as Lobster season just started and I,m High and Dry. Please help. Thanks guys, Peace, Paul G. |
Graham Lamb
Senior Member
Username: galamb
Post Number: 5968
Registered: 05-2007
| | Posted on Wednesday, October 07, 2009 - 01:25 pm: |
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Paul, is the flywheel stuck on the crankshaft and won't come off or do you mean that the flywheel won't "rotate", indicating that the motor is seized right up?? |
paul gomez,jr.
New member
Username: pago619
Post Number: 3
Registered: 10-2009
| | Posted on Wednesday, October 07, 2009 - 01:33 pm: |
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Hey Graham, yeah, ive gotten the flywheel loose. It's that I can't get it to rotate. Thanks |
Graham Lamb
Senior Member
Username: galamb
Post Number: 5971
Registered: 05-2007
| | Posted on Wednesday, October 07, 2009 - 01:42 pm: |
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So then it's "most likely" that the pistons are seized in the cylinders.
Could also be a totally seized bearing (crank or connecting rod etc).
Regardless, you are going to have to completely tear down the block to find the offender.
As long as the crank itself is not damaged it can be rebuild at a reasonable cost if you can do most of the work yourself.
The cylinders will most likely have to be bored out (or at the very least honed), so count on 250 bucks for that at a machine shop (shouldn't try that one at home).
Then depending on the actual problem, you could count on 700-1000 bucks for pistons, rings, bearings and gaskets.
Upwards of 1250 bucks may sound like ALOT of money, but consider the replacement cost of a new 150 is considerably north of 10K (and more like 15K), a total rebuild could easily extend the life of your current motor by 10-20 years.
If you consider a "used" replacement, you must keep in mind that the average lifespan of a motor above about 125 horses is 8 to 12 years before it will require a rebuild - so you can rebuild your own, or buy someone elses and rebuild it (if not immediately, most likely in the near future).... |
paul gomez,jr.
Member
Username: pago619
Post Number: 4
Registered: 10-2009
| | Posted on Wednesday, October 07, 2009 - 02:13 pm: |
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I'm sorta thinking/hoping that it could be a crankshaft bearing and that the crank is O.K. So I'll get to tearing down the block and see. I'm an out of work machinist, so I've got a little time on my hands. I guess my next step will be to figure out how to remove the bearing and split the block. Also, you are right on about the motor lifespan. I've owned mine since 1996 and have never had any major problems till now. Thanks again for getting back with your input. I really appreciate it. Peace, Paul G. |
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