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Author Topic:   Stuck ring after 100 hours use in "new" OMC 115
Gene in NC posted 09-08-2003 12:45 PM ET (US)   Profile for Gene in NC   Send Email to Gene in NC  
Fresh water '82 OMC 115 that looks like new cost me $250. Owner conned into buying new engine. What is prob that good soak with Marvel Mystery oil and running with Yamaha Ring Free will free up the rings. What prob that other cylinders waiting to fail?

Why would the ring stick in the first place? So little use that cross hatch still showing in cylinders.

jameso posted 09-08-2003 02:29 PM ET (US)     Profile for jameso  Send Email to jameso     
Gene did this engine come off a LES or CPD hull?
Gene in NC posted 09-08-2003 03:05 PM ET (US)     Profile for Gene in NC  Send Email to Gene in NC     
Boat was common runabout of that time frame. Boat looked as little used as claimed. Rig had apparently been owned by elderly uncle.
What is LES or CPD.
flyguy posted 09-08-2003 03:25 PM ET (US)     Profile for flyguy  Send Email to flyguy     
maybe it blew a head gasket, some water got inside, and the ring froze up a bit. not the most serious of problems.
Bigshot posted 09-11-2003 04:22 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Trick a friend got in Yamaha school.

Run a can of Techron mixed with 2 stroke oil(50:1) gas. Run the can almost dry but shut her down before she runs out of gas. Let it sit overnight and start up on fresh gas/oil. She might need starting fluid to start in the morning. Run her and check compression again. This is what they were told "can" free a stuck ring. I would of coure soak with ring free or something before hand. Stuck rings are usually from sitting or from carbon build up. If from sitting the marvel and ring fee may do the trick. If from carbon the techron will.

Sal DiMercurio posted 09-11-2003 08:33 PM ET (US)     Profile for Sal DiMercurio  Send Email to Sal DiMercurio     
How do you know a certain ring is stuck & not broken?
The engine is a 1982, thats 21 years old.
You don't know what kind of oil has been run through it.
It could be loaded up behind the rings with carbon.
Usually if a ring sticks, it breaks, & if it broke, the engine needs to be torn down & repaired.

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