Columbia Commuter problem

Hi,

I've been fixing a 1977 Columbia Commuter. It runs a little slower than it should be, but it produced a lot of smoke from the muffler. What could this indicate? Thanks!

Re: Columbia Commuter problem

If it was blue smoke then ur oil to gas ratio it a little rich. Explain the color of the smoke...

Trac Man

Re: Columbia Commuter problem

but if your gas/oil ratio is like 50:1 than you may need new rings how many miles does it have

Re: Columbia Commuter problem

Well, it wasn't very blue and I am fairly certain the ratio is 50:1. The color was more greyish white than anything. It has about a thousand miles on it. Thanks for the answers!

Re: Columbia Commuter problem

You're probably running rich, or your exhaust may be clogged a little....Does it smoke the whole time, or just when you start it?

Re: Columbia Commuter problem

It smokes not when I start it, but when gas is applied. It doesn't stop even when it has warmed-up. Thanks!

Re: Columbia Commuter problem

If its not normal two stroke exhaust (bluish smoke) then maybe a little tranny fluid is sneaking past a seal and being sucked into the crank case. Almost all moped motors have a split case design and the gearbox is segregated from the rest of the engine in its own compartment, but if the two metal surfaces of each case half weren't sealing completely, fluid get get into the crank case segment. From there it would get pumped up into the combustion chamber from the intake ports. You might run it a while and see if you are losing tranny fluid at an accelerated rate.

Just a thought.

Dave

Re: Columbia Commuter problem

A blown bearing seal could also account for this phenomenon, that may be more likely if you are burning trans fluid.

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