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Forum: Gas Engines

01-05-2007, 06:46 PM

Replies: 151

3W 100 quits in Knife Edge

Views: 20,732

Posted By Flypaper 2

RE: 3W 100 quits in Knife Edge

If your going to get another carb, see if you can get an equivalent Walbro. Much better carb. One time I switced equivalent throat size carbs on a Q 42. The Walbro had 200 more RPM at the top. It's...

Forum: Gas Engines

01-04-2007, 10:13 PM

Replies: 151

3W 100 quits in Knife Edge

Views: 20,732

Posted By Flypaper 2

RE: 3W 100 quits in Knife Edge

Popoff pressure should be no less than 12 PSI.

Forum: Gas Engines

01-04-2007, 12:00 PM

Replies: 151

3W 100 quits in Knife Edge

Views: 20,732

Posted By Flypaper 2

RE: 3W 100 quits in Knife Edge

I wouldn't touch the spring . It's doing what it's supposed to. A proper pressure gauge that I used to use cannot leak for a proper test. With a none leaking gauge, and the pressure kept dropping was...

Forum: Gas Engines

01-04-2007, 09:18 AM

Replies: 151

3W 100 quits in Knife Edge

Views: 20,732

Posted By Flypaper 2

RE: 3W 100 quits in Knife Edge

There's no way the engine should stay running with the butterfly completely closed, which shows an air leak somewhere. Running an overly rich idle mix points to this too, as it is making up for the...

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