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| I have a Toro lawn mower, Model 20584, with (I think - although I'm not sure) a Tecumseh engine 47PH7-212096 (How do you tell if your engine is Tecumseh or Suzuki?). The engine had been surging badly. I just cleaned the carburetor and put the parts to the Toro carburetor kit (gaskets & needle valve) in - and surging is gone. But now engine runs with no surging idles much too fast. Don't know if the carburetor float needs adjusting. I found a Toro engine service manual on line which lists carburetor float drop as 11/16" for engine model 47PD3, but N/A for engines 47PE4 and 47PF5. Since mine is a model 47PH7, I'm not sure precisely what to do about the float drop - or why for two engine models listed in the service manual the drop is listed as "N/A."
Does anyone know what - if anything - the float drop for engine model 47PH7 should be? Thanks. |
Follow-Up Postings:
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- Posted by wolfgangamadeus none (My Page) on Mon, Feb 21, 11 at 11:56
| Oooops - I think it's a Suzuki engine. |
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| Try this: With carb apart, and float in place, turn upper part of carb, with needle valve and float in place,upside down. Peer at carb part and float. Gently raise the float to its limit. The measurement at the outer edge of the float, at the highest point of movement, is where you measure for float drop, which in this case will not be drop, but raise. I am assuming that you have the carb apart, and know it has a float!? |
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- Posted by wolfgangamadeus none (My Page) on Sun, Feb 27, 11 at 15:18
| Thanks Rusty - Had the carburetor apart a couple of times - most recently I figured out that the float drop is not adjustable at all. The drop is controlled by a plastic tang on the float - and that tang is not bendable or in any fashion adjustable (unless you want to snap that tang off - which would probably be very inadvisable). I am now playing with all the linkages. I've ordered two new linkages from Toro, as well as two new springs. Hopefully, I'll be able to figure out how they should be set (the Service Manual is not much help). My problem., I think, is with the governor/throttle linkage. |
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