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Funtech 50 2stroke oil in crankcase problem

Hi All,
Just wondering if anyone has had a problem with their Funtech 50 filling up the engine
crankcase with two stroke oil after the vehicle has been sitting for more than a week or so.
If I start it every second day, I don't have the problem. But after a week, when I go to start it
the excess oil in the engine fouls the spark plug and it won't start. When I remove the plug and crank the engine over, quite a lot of oil is ejected from the cylinder, not enough to hydraulic lock the piston but then I havn't left it for a long time to see if it will fill the cylinder completely. I am guessing there is some sort of oil distribution pump in the engine that may have a by-pass problem, but so far I am unable to locate a workshop manual or parts diagram to give me an idea whats happening inside there.
I attemted to contact Secma in France a while back, but to no avail. Maybe their just not interested in
three wheelers anymore, dont know!
If anyone has had this problem before, or knows where I can purchase a workshop manual for
these engines, your reply would be greatly appreciated.

It's great to see a Website dedicated to such a minority vehicle with so many keen subscribers.
Hats off to Cunninghams for making this possible.

Cheers,
Rob

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Permalink Reply by Alex on March 22, 2009 at 8:37am

Hi

I'd guess that this is not an Oil Pump problem. (I'd have to see it to 100% on this)

I'l suggest that it's far more likely to be a Carb / Fuel tap problem.

Again - I don't know because I have never had a 3 wheel pod, but my advice would be to strip and clean the carb. Chack that the Float valve is totally clean.

If these have a Vacuum Fuel tap ypu may need to also replace the Diafram, usually easy enough to do but you will need to drain the tank or clamp the fuel lines.

Alex.

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Permalink Reply by Rob Walters on March 23, 2009 at 5:58am

Hi Alex,
Thanks for your speedy reply. I have already checked the fuel system out, when I fitted larger jets to the carb.
This 50 has an expansion chamber fitted and a larger volumn air filter, so larger jets were fitted to prevent it
leaning out. But I should clarify that it's not oil/fuel mixture in the cylinder, it's straight 2 stroke oil. These
50's are oil injected not premix. It looks as though I will just have to pull the engine out and have a closer
look at the oil distributor and see if I can see any wear in anything.
Once again thanks for your reply, and if you think of anything it might be, please dont hesitate to drop me a line.

Cheers Rob.