I have fixed the plugged muffler, and it runs great.
However I get a lot of smoke out the tail pipe, especially when I turn up the speed.
I still use the oil injection, and regular fuel in the gas tank.
It runs just fine.

Any suggestions of the cause, or any fixes?

thanks,
Walt

 

My sons LT50 had a leak at the crank seal on the trans side. Trans oil was causing the smoke for us. Unfortunatly, the cases have to be split to get to that seal. Good luck.

 

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The 3 main factors for smokey 2 stroke engines are:

1 - Improperly set carb. A rich "Gas & Air" mixture will smoke more then a beer bottle brown spark plug mixture.

2 - Too much oil. Too much pre-mix or the factory OI system is pumping out too much oil. aka: Rich Oil mixture.

3 - The brand of oil. I've been told that mineral based oils smoke really bad - all the time. Synthetic base oils smoke very little. Hybrid / Mixed based oils tend to smoke at start up, then becomes less smoke as the engine warms up.


With these items in mind, check the spark plug color, verify the brand of your Injection Oil and if possible, check the flow rate of your O/I system. If items 1 and 3 are correct, then you may have to ask your dealer to adjust the OI flow rate. Or, convert to pre-mix. We recently switched to Amsoil Dominator (soon: Amsoil Intercept) Premix at 50:1 and for us, it runs great. Little smoke on a cold engine but after she warms up for 20 minutes, very little smoke at all. Especially in the 1/4" Plus throttle range.


Hope this helps....

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To read the spark plug..... Run it at xx throttle position (at a steady postion) for 200+ feet, then kill its engine using its kill switch. Then, remove the plug to see its color. For a really nice color chart, surf entire page of: http://www.dansmc.com/Spark_Plugs/Sp...s_catalog.html


One of my buddies has a 2 stroke as well. His smoked a little too much for his liking. So, he raised the C-Clip on the carbs main needle. This lowered the needle in the same throttle postion. Thus, creating a less rich air / gas mixture - in the same throttle position. Today, his plug is closer to a beer bottle brown color and thus, its engine pumps out less smoke. As explained by many, the dealers usually set the carb's a little richer then one expects. If one goes riding in a lower altitude (or dramatic temperature change), this richer set carb won't be too lean on lower ground.


Might want to investigate the idea of adjusting the carb's main needle.


Hope this helps as well....

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