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I work on them. The cable from the handle is a deadman switch only, it kills the engine when released by cutting the ignition and applying a band brake to the flywheel. It does not control the throttle. The way the carburetor in the photo is configured, it is set up to run at full speed only. I see an idle speed screw, but it will never come into play the way it is set up. The high speed is adjusted by bending that piece of metal the governor spring anchors too. Top speed of around 3200 rpm is reasonable, the engine will run faster, but shouldn't. The carb linkage looks correct from here. Those carburetors aren't too hard to rebuild. Curious, is the new carb a Techumseh unit or a Chinese varient? EDIT It looks like your governor is out of adjustment, between the air filter and engine block. That arm and the shorter part that are joined with a bolt should be roughly 90 degrees to each other. Be carefull not to overspeed it, will grenade.  http://www.barrettsmallengine.com/manual/tecumsehlheadmanual.pdf governor setting page 27 on the actual manual, on the pdf page 31 UnderToad fucked around with this message at 02:40 on Apr 27, 2019 |
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Apr 27, 2019 02:20
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| # ¿ May 11, 2024 12:58 |
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The new ones just run at full speed all the time, yours is one of those. I think the only thing you need to do is set the gov arm by loosening the bolt with the torx head, move it so it is 90 degrees to the shorter piece it attaches to, then tighten torx bolt. Yours is at about 120 degrees. Then if you need to set the top speed, do it by bending the tab behind those two vertical bosses on the top of the carb. The older versions had a plate that bolted to the top of the carb with a high and low speed, yours does not have that, it's just one speed, all the time. I've had good luck with the Chinese Ebay carbs, suprisingly.
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Apr 27, 2019 03:34
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