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CaribooHarry 02-05-2010 08:41:30 64.114.203.19 78567 Report to Moderator	Bought TEA-20 last fall with a stuck clutch. Replaced clutch disk and rebuilt transmission at same time. Got it running this week, engine starts first turn every time and runs fine but doesn't rev up much past 1200 rpms and when hot backfires when I throttle down. Couldn't find this exact situation in archive so need members advice. (Carburetor: a latin word which means "don't touch") [Reply]   [No Email]
firehorse5_0 02-06-2010 09:02:21 174.39.170.180 78600 Report to Moderator	Re: Carb Adjustments in reply to CaribooHarry, 02-05-2010 08:41:30   Love your latin quote. Smart man. lol   [Reply]   [No Email]
Bob (Aust) 02-05-2010 14:52:50 124.185.147.44 78577 Report to Moderator	Re: Carb Adjustments in reply to CaribooHarry, 02-05-2010 08:41:30   I'd be looking at spark advance and retard and governor operation and adjustment before looking at the Zenith carb. If you are getting fuel starvation, remove the fuel tap and bowl assembly and clean out the tap assembly that goes inside the fuel tank. This post was edited by Bob (Aust) at 14:54:30 02/05/10.   [Reply]   [No Email]
Jerry/MT 02-05-2010 10:10:39 206.183.116.129 78569 Report to Moderator	Re: Carb Adjustments in reply to CaribooHarry, 02-05-2010 08:41:30   I agree with phil. First check to make sure that you hae the requisite FAT, BLUISH-WHITE SPARK, the color of lightning. You can make a tester outof any old spark plug by gapping it to about 3/16-1/4" and putting it at the end of any spark plug wire and holding in near a good ground. If it jumps that gap with authority and is the color of lightning, that"s good. Next check your initial timing with a timing light and make sure that"s per the Spec for your Standard engine. Also check the centrifugal advance to make that is operating smoothly with increasing rpm and decreasing rpm. The advance mechanisms can get sticky due to oil, rust, dirt etc. Since you can only achieve 1200 rpm, you need to check and possiblty adjust the governor linkage. You"ll need the manual for this. I doubt your carburetor is the problem so don"t mess with it yet. Do these things systematically and you find the problem. Let us know what you find.   [Reply]   [No Email]
phil(va) 02-05-2010 09:51:15 207.69.139.144 78568 Report to Moderator	Re: Carb Adjustments in reply to CaribooHarry, 02-05-2010 08:41:30   Try setting the ignition timing before messing with carb. You should check the point gap first, of course.   [Reply]   [No Email]