grady28 said:
At the advise of my dealer, I did a shock treatment today using ring free. Mixed 3 gal with 7-8 oz of ring free and connected directly to the engine filter. Ran about 2.5 gal thru revving engine, and shutting down for 20 mins and then running again. After finishing, replaced with new spark plugs and engine seems to run better. Took for a ride and ran WOT at 5200 RPMs. Engines are YAM 225 OX66 2 strokes. After running it a bit came back and engine was much better but still shaked a little but no where near as much as before. It was smoking a little bit more than port engine leading me to believe it may be running a little rich on the oil. Does anyone know how to adjust the oil? Should I try anything else?
If you can determine the color of the excessive smoke, that would help with a fix. Blacker smoke is causedby a too rich fuel mixture. Bluish smoke comes from excessive oil. White smoke is a bad sign and is caused by water in the combustion chamber or exhaust system.
The oil adjustment is called oil pump synchronization and is relatively simple to check but you really need the manual to help you identify the parts to look at. Basically,there is a linkage from the throttle to the oil pump. That linkage moves as the throttle is moved and the oil pump arm should be just about touching the stop when the throttle is closed. The oil pump arm is spring loaded and if the linkage is disconnected or broken, the spring makes the moves the arm towards max oil flow. Now, if the motor is running at WOT or near to it, the oil pump will normally be at max flow position so if you have smoking at WOT, it is probably NOT the oil pump adjustment.
Note that the fact that the shock treatment helped is a good sign but after that treatment you have to go over all the routine checks again. The treatment can loosen and move gunk around. Plugs are most likely to get fouled as is the O2 thimble or O2 sensor.
I am curious about one thing. Did you routinely use Ring Free or was the shock treatment the first time?
