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Jan 23rd, 2013
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98' Yamaha 150 2 stroke opions or advice #12494535
11/06/17 11:28 PM
11/06/17 11:28 PM
Joined: Jun 2011
Posts: 145
Ft. Worth
D
Dothead Offline OP
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Dothead  Offline OP
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Joined: Jun 2011
Posts: 145
Ft. Worth
My engine locked up while running WOT. After pulling plugs I can see that 1 piston does not move at all. The crank will only turn about an inch in either direction. There are no holes in the block, or fluids leaking that I can see. If this is rebuildable, does anyone have any idea what it might cost? Would I be better off buying another rebuilt powerhead? Thanks in advance if anyone has any info or advice.

Re: 98' Yamaha 150 2 stroke opions or advice [Re: Dothead] #12494580
11/07/17 12:25 AM
11/07/17 12:25 AM
Joined: Nov 2007
Posts: 3,582
scotland tx
ssmith Online content
TFF Team Angler
ssmith  Online Content
TFF Team Angler

Joined: Nov 2007
Posts: 3,582
scotland tx
pull the bottom plug out of the lower unit see what it looks like if it smells burnt an has pieces out metal drop the lower unit a broken pinion gear will lock up the works too.

Re: 98' Yamaha 150 2 stroke opions or advice [Re: Dothead] #12494610
11/07/17 12:57 AM
11/07/17 12:57 AM
Joined: Jun 2011
Posts: 145
Ft. Worth
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Dothead Offline OP
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Dothead  Offline OP
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Posts: 145
Ft. Worth
Wouldn’t all of the pistons be locked up though? I’m sure it’s in the engine.. I lost power, then it stopped abruptly..

Re: 98' Yamaha 150 2 stroke opions or advice [Re: Dothead] #12494660
11/07/17 01:35 AM
11/07/17 01:35 AM
Joined: Mar 2015
Posts: 457
Dallas, Texas
C
Cat finder Online content
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Cat finder  Online Content
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Joined: Mar 2015
Posts: 457
Dallas, Texas
Does the prop spin freely when in neutral?


If the fish don't bite your not baiting right...
Re: 98' Yamaha 150 2 stroke opions or advice [Re: Cat finder] #12494664
11/07/17 01:37 AM
11/07/17 01:37 AM
Joined: Jun 2011
Posts: 145
Ft. Worth
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Dothead Offline OP
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Ft. Worth
Originally Posted By: Cat finder
Does the prop spin freely when in neutral?

yes

Re: 98' Yamaha 150 2 stroke opions or advice [Re: Dothead] #12495477
11/07/17 06:52 PM
11/07/17 06:52 PM
Joined: Dec 2013
Posts: 304
Plano, TX
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PlanoPaul Offline
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Posts: 304
Plano, TX
Having someone rebuild would be big bucks. Only way a rebuild makes sense money wise is to do it yourself. You would be very surprised how simple these carbed two stroke are. If you have a service manual and a little common sense, you can do it. I’ve rebuilt two motors now and both turned out great. Bought my last boat for $600 because the Johnson 140 had been overheated. Cost me $1300 to rebuild it, and now have a nice little boat. If you don’t want to take on a rebuild, then finding another powerhead is the way to go.

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