50cc 2-STROKE OIL IN FLOAT BOWL By fastrax (Read 1,171 times)

[fastrax]

We had a customer bring in an older JCL 2-stroke 50cc scooter yesterday that has been sitting for about 3 years. He said he had an oil leak and the oil tank was dry. We saw no signs of leakage so we deceived to try & make it run. anything that has sat that long we always pull the carb & check it out, the float bowl on the carb was full of 2-stroke oil (no gas, just straight oil). Any ideas on how the oil got from the oil tank into the float bowl of the carb?

[crwford]

customer my have caused it by adding oil to gas or put in a additive which may look like oil. BUT HAVING 2 POINTS one fuel one oil see no other way it could happen.

[rapidrob]

If it has oil injection, oil had to be added to the gas and the gas had long since evaporated leaving the oil in the carb bowl. Seen it many times over the years.
As for an oil "leak", most of the oil injectors use gears to "push" the oil into the engine. Many of the oils today are so thin they can leak past the teeth and seep into the engine ( some engines have check valves to stop this and they can stick open or fail) or just leak due to a long time sitting with head pressure of the oil in the tank.
It would be interesting to see how much oil is in the crankcase?

[cyborg]

Jun 1, 2017 13:46:34 GMT -6 rapidrob said:

If it has oil injection, oil had to be added to the gas and the gas had long since evaporated leaving the oil in the carb bowl. Seen it many times over the years.
As for an oil "leak", most of the oil injectors use gears to "push" the oil into the engine. Many of the oils today are so thin they can leak past the teeth and seep into the engine ( some engines have check valves to stop this and they can stick open or fail) or just leak due to a long time sitting with head pressure of the oil in the tank.
It would be interesting to see how much oil is in the crankcase? [/quote)



What he said ,,,