I�ve got one of those chuzuki 2-stroke motors (ie. a clone of the Suzuki M120X) that Masport sold as the �IronForce� (as distinct from the earlier IronHorse) on some of their mowers for a relatively short period back in the noughties. The motor in question features in the following video (which was not made by myself)�
I bought my particular unit off a footpath-collector a couple of years ago, and from memory I think the compression tested in the high-90�s at the time, which was at least as good as either of my Suzukis - neither of which are unduly smokey. When running, however, the chuzuki has been consistently smokey, no matter what I try...
At first I thought that perhaps the previous owner had tried to use some motor oil instead of proper 2-stroke oil in his fuel mix, and the stuff had perhaps sludged up on the inside walls of the crankcase. However, I�ve run the thing for long enough myself now that the amount of proper fuel that would have since travelled through the crankcase would have surely been enough to de-sludge it. And the oil I use is Castrol Activ 2T, which is quite pricey, and formulated amongst other things to reduced smokiness.
The next thing I tried was to swap over a properly cleaned and adjusted Mikuni carb from my standby Suzuki onto the chuzuki, but this didn�t yield any improvement in the situation either. Nor did swapping the plug over with a genuine NGK, in place of the possible NGK-clone that was originally installed in the unit (You never know with the Chinese, do you�) The plug colour is actually not too bad, and the exhaust port is more or less fully clear. The air-filter sponge is also good.
Anyway, if you watch the video that I linked to above, you�ll notice that the guy guns the unit slightly at about the 50sec-mark. The result: smoke abounds, in much the same fashion as with mine. There's also a few short write-ups over at ProductReview and one particular chap there really bags the model for, amongst other things, its smokiness:
So, in conclusion, I�m just wondering whether anyone else here has got one of these things themselves, and if so - is it smokey, or were you able to do something with it that somehow got on top of the smokiness?
Or, has it perhaps been unsmokey for you since purchase?
