My decades old L120 (always reliable until this year) has had a fit getting back to normal this year. Replaced starter, fuel lines, fuel pump, clutch, plugs, air filter, one of the spindles and all -- but had removed carb and cleaned it out and in replacing that carb think I've incorrectly attached the throttle cable to the governor adjuster or whatever the bracket down below the carburetor is called. And, to mention this quirk, before I got the mower someone replaced whatever engine it originally had with a Briggs & Stratton Model 350777-1034-A1 (Code 97061711) which bears labels indicating the engine is a 19.5 I/C Platinum Craftsman engine (which is why I believe the engine was replaced -- otherwise why would my Deere have a Craftsman labeled engine, right?).
So, by the way, I believe the carburetor on that engine is an 847395 B&S unit. Whatever. It was running rich. I thought I'd watch Youtube videos and saw Tarryl's video about the little nozzle gasket with four holes at top being clogged up -- but my carburetor is a single barrel and the 841649 part I got was a wasted $6.00 purchase. Fine. However, in investigating the matter (and considering why the engine would run rich) I noted that the choke plate wasn't fully opened up when choke lever pulled back -- so I adjusted that and the engine ran brilliantly -- but at full throttle only and adjusting the throttle lever does nothing about that. Which almost brings me to my question -- after investigating governor adjustments and looking at the whatever that bracket is with springs and stuff with the round plate on front (below the carburetor) I realized that I had probably connected the throttle cable to the wrong hole on that round plate because when I adjusted the throttle lever to low speed it was shoving that plate into wide open throttle. There was a different (lower) hole on that plate so I re-located the throttle cable to that hole and thought that would fix it. Nope. Still running at wide open throttle -- it'll mow and all -- but only without the air filter -- a brand new clean one.
So, my question: Is anyone familiar with the engine model noted above and its governor/throttle linkages? If so, if you could give a bit of advice on how to regain throttle control over the speed of the engine, I would be most appreciative. It could be a missing spring allowing the governor to be wide open. I'm going to see if the governor needs adjustment and get into the operating works of that throttle/governor bracket and see if I can figure out what needs fixing but thought I'd ask for insight and advice if anyone can provide same.
Thanks for your assistance. I'm not really much of a small engine guy -- but will add that I've checked valve clearances and the guides haven't dislocated so that isn't a factor involved (just to note).
So, by the way, I believe the carburetor on that engine is an 847395 B&S unit. Whatever. It was running rich. I thought I'd watch Youtube videos and saw Tarryl's video about the little nozzle gasket with four holes at top being clogged up -- but my carburetor is a single barrel and the 841649 part I got was a wasted $6.00 purchase. Fine. However, in investigating the matter (and considering why the engine would run rich) I noted that the choke plate wasn't fully opened up when choke lever pulled back -- so I adjusted that and the engine ran brilliantly -- but at full throttle only and adjusting the throttle lever does nothing about that. Which almost brings me to my question -- after investigating governor adjustments and looking at the whatever that bracket is with springs and stuff with the round plate on front (below the carburetor) I realized that I had probably connected the throttle cable to the wrong hole on that round plate because when I adjusted the throttle lever to low speed it was shoving that plate into wide open throttle. There was a different (lower) hole on that plate so I re-located the throttle cable to that hole and thought that would fix it. Nope. Still running at wide open throttle -- it'll mow and all -- but only without the air filter -- a brand new clean one.
So, my question: Is anyone familiar with the engine model noted above and its governor/throttle linkages? If so, if you could give a bit of advice on how to regain throttle control over the speed of the engine, I would be most appreciative. It could be a missing spring allowing the governor to be wide open. I'm going to see if the governor needs adjustment and get into the operating works of that throttle/governor bracket and see if I can figure out what needs fixing but thought I'd ask for insight and advice if anyone can provide same.
Thanks for your assistance. I'm not really much of a small engine guy -- but will add that I've checked valve clearances and the guides haven't dislocated so that isn't a factor involved (just to note).