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Dec 30th, 2023
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 Piston diagnosis
#12919182
10/01/18 09:03 PM
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Joined: Sep 2011
Posts: 178
Shawn the printer
OP
Outdoorsman
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OP
Outdoorsman
Joined: Sep 2011
Posts: 178 |
 Can anyone take a look at this piston and tell what went wrong for me? The only thing that is making sense to me is that the rings would no longer retract into the piston grooves, and the ring caught and broke. I also had to replace the other two pistons for the same problem. They werent really scuffed just wore out. Thanks for any ideas
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 Re: Piston diagnosis
[Re: Shawn the printer]
#12919200
10/01/18 09:17 PM
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Joined: Sep 2003
Posts: 5,887
Bruce's
TFF Celebrity
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TFF Celebrity
Joined: Sep 2003
Posts: 5,887 |
Looks like a ring stuck. Do you run ring free
Fishing Texas lakes one at a time
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Re: Piston diagnosis
[Re: Shawn the printer]
#12919241
10/01/18 09:50 PM
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Joined: Sep 2011
Posts: 178
Shawn the printer
OP
Outdoorsman
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OP
Outdoorsman
Joined: Sep 2011
Posts: 178 |
It is a 50hp Yamaha of a friend of mine. The carbon deposits werent terrible, but there was quite a bit built up in the ring grooves. Im just trying to make sure it doesnt fail again from a problem I didnt see. Carb on that cylinder looked very clean when I put a kit in it.
Thanks
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Re: Piston diagnosis
[Re: Shawn the printer]
#12919331
10/01/18 11:09 PM
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Joined: May 2003
Posts: 11,586
gary purdy
TFF Guru
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TFF Guru
Joined: May 2003
Posts: 11,586 |
Carbon build up. A 2 cycles worst enemy. Use Sea Foam or ring free fuel additive.
The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
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Re: Piston diagnosis
[Re: Shawn the printer]
#12920302
10/02/18 07:39 PM
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Joined: Nov 2002
Posts: 4,439
Gamblinman
TFF Team Angler
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TFF Team Angler
Joined: Nov 2002
Posts: 4,439 |
Looks like bottom ring hung in a port and snapped the ring lands. Could have been several causes, but carbon build-up is one of them.
I run Mercury Quickleen in all my gas engines, from autos to chainsaws. Helps keep injectors clean and combustion chambers from carbon build-up.
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