G'day, I just joined the forum to maybe get some info about a Tanaka TCB 220. I bought it new years agorying to fix the original. have not used it for years but now I have moved to a country property I would like to get it up goinjg again. So far I have put new fuel in the tank, new fuel filter, spark plug and stripped the carby which is a Walbro WYJ 8 M9. I cannot find that particular carb on the Walbro site. I decided it would be just as easy to buy a new carb instead of that was a mistake, the carb I received had the throttle movement on the opposite side going in the wrong direction and it did not have the hole drilled to match the hole in the intake of the crank case. All of the replacement carbs I have seen have the primer bulb fitted on the carb where as this one has it fittled to the side of the carb. I have ordered a carb rebuild kit to maybe get the original carb back into running order. I have checked the exhaust to make sure it is clear and not gummed up, there is a good sparke at the plug. The piston has good compression.
Things I have noticed so far. The original fuel pump diaphram is incorperated in the gasket where as the replacemnts look like you get a the diaphram as seperate piece. My carb has a metal plate sitting above the diaphram which I assume needs a gasket on either side of it.
I must admit I am a bit puzzled by these little 2 stroke carbys, I can do a full desmo service on my Ducati Multistrata motorbike but that goes suck, squeeze, bang blow I can figure that out. I would really like to figure this out as I have a few chainsaws that require attention as well. Quick update, I just went and had a little play with it and the fuel pump diaphram is not one piece with the gasket, it was just very well stuck to is, now seperated. When pressing the primer bulb it transfers fuel through the system but the smaller return pipe has quite a few air bubbles in it. Sometimes it starts for about 2 seconds then dies.
