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Max Online: 36273 @ 01/23/13 02:34 PM
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#12494535 - 11/06/17 05:28 PM 98' Yamaha 150 2 stroke opions or advice
Dothead Offline
Outdoorsman

Registered: 06/06/11
Posts: 128
Loc: 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.

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#12494580 - 11/06/17 06:25 PM Re: 98' Yamaha 150 2 stroke opions or advice [Re: Dothead]
ssmith Online   content
TFF Team Angler

Registered: 11/22/07
Posts: 3313
Loc: 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.

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#12494610 - 11/06/17 06:57 PM Re: 98' Yamaha 150 2 stroke opions or advice [Re: Dothead]
Dothead Offline
Outdoorsman

Registered: 06/06/11
Posts: 128
Loc: 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..

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#12494660 - 11/06/17 07:35 PM Re: 98' Yamaha 150 2 stroke opions or advice [Re: Dothead]
Cat finder Offline
Angler

Registered: 03/14/15
Posts: 446
Loc: Dallas, Texas
Does the prop spin freely when in neutral?
_________________________
If the fish don't bite your not baiting right...

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#12494664 - 11/06/17 07:37 PM Re: 98' Yamaha 150 2 stroke opions or advice [Re: Cat finder]
Dothead Offline
Outdoorsman

Registered: 06/06/11
Posts: 128
Loc: Ft. Worth
Originally Posted By: Cat finder
Does the prop spin freely when in neutral?

yes

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#12495477 - 11/07/17 12:52 PM Re: 98' Yamaha 150 2 stroke opions or advice [Re: Dothead]
PlanoPaul Offline
Angler

Registered: 12/16/13
Posts: 276
Loc: 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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