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I have no doubt that carb was large enough to run an 80 cubic inch Harley .You open it up and look through the bore all you could see was piston, big one .

Welcome indeed .Seems there's a lot of Harrys' showing up on the net here of late .:/: A tach is okay but all it does is check your ear .That saw is going to run where ever it wants too .Those factory specs mean very little in terms of total accuracy . Follow that Madsens link,you'll be good to...

Live and learn, it was a combination of things . :)

If you are intersted in really fine tuning a carb,this might help http://www.aerocorsair.com/id27.htm

That not killing the spark is not related to the carb nor would it cause it to run away . Usually it's the ground jumper wire going from the handle to the engine case gets loosened up or broken . Oh every so often you get a coil you can't ground out but it's pretty seldom . Oh not to...

If he has a spacer on each side of the checks it won't run worth a hoot because the checks won't seal properly . I got the order wrong once on an 042 and I could start it okay but it would fall on it's face about 15 seconds into the cut and about drove me nuts . Made me so mad I stuck that...

Aha,just as I thought .This is a model HD Walbro,fixed jet but the idea is still the same . From the carb body out ,check valves,spacer gasket ,cover .

I'll peel down an SDC in a little bit .I might be wrong about the check placement .

Yep,that's a compensater carb . Something doesn't look quit right on the third picture to me . The thing looks like it has two spacers on the check vaves . I would have thought the checks fit right against the carb body but maybe not :?

You can but if they are working don't fool with it .You are better off leaving the backers in . The newer kits seem to use a harder black plastic material for the checks I've noticed . Perhaps this material is more suited for the funky gas we have now ? That reving most likely is an air leak...

That thing might be new enough to have a compensating carb on it."intelli- carb" or something like that . That being the case I would assume it works something the the 200 T and takes an air suction from the filter box to the vent side of the metering diaphragm ..It the filter starts to clog...

Another thing popped up in my mind .Some of the Walbro kits contain double check valves .One set is a brown fiberous material and the other is a black softer material . The black one goes towards the carb body with the brown as a back up .They will actually work without using the backers with...

You could have the spacer gaskets on the wrong side of the check valves or the metering diaphragm spacer out of order . I'm not trying to insult you but I've done it myself and I should know better .Chit happens . Not only once,mind you but twice in the same day .:( Take a peek at Mike Acres...

Walbros site is very good --when it works .That doesn't happen to be today though .