Ok i will switch it in a little bit and if it doesn't help (i don't think it will), i will start to port out the jet, assuming no gunk got in their (Again), like you guys said it may be a clogged main jet even though i deep cleaned it. Will update soon.
10Hp tecumseh Cherry Red MUFFLER!
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Russ2251
AZUSA:Powered by LAWN-BOY
Makes perfect sense...behaving like a Coleman lamp.
Russ2251
AZUSA:Powered by LAWN-BOY
Based on this statement, I would ignore it.
Kaptain Krunch
Pro Junk Collector
Do a plug chop THEN figure out where to go from there. Might need to adjust carb, might just need to clean the airfilter, might have to drill out or get a smaller jet.
Russ2251
AZUSA:Powered by LAWN-BOY
Does this engine have a choke?
TurtleMann14
Insane plan member
if it is backfiring its not burning all of the fuel and air... check timing
BriggsTwins
New member
well after looking at your pix, that screw that likes to vibrate out probably is the mix screw. all carbs have some form of adjustment (sometimes) i would try backing that one out and adding a drop or two of threadlocker for good measure. other than that i dont know what to tell ya
Linksep
New member
That little screw is just for the idle mixture, not the high-speed mixture.
You have a Series 3 or Series 4 carb. According to the manual they are used on 8-12.5HP engines; problem with that is you are claiming to have a fixed jet. The manual doesn't say that the series 3/4 carbs have fixed jets; it does however note that Emissionized series 1 carbs (2-7HP) may have a fixed jet. Soooooo it looks to me (based on the manual) like you have a fixed jet from a much smaller engine and you're running way lean as we have all been stating since page 1. Go back to the guy and get the right (adjustable jet) or get out the drill and start hacking.
Kenny was right on page 1 and page 2. You have some Frankencarb that is not as the factory intended.
You have a Series 3 or Series 4 carb. According to the manual they are used on 8-12.5HP engines; problem with that is you are claiming to have a fixed jet. The manual doesn't say that the series 3/4 carbs have fixed jets; it does however note that Emissionized series 1 carbs (2-7HP) may have a fixed jet. Soooooo it looks to me (based on the manual) like you have a fixed jet from a much smaller engine and you're running way lean as we have all been stating since page 1. Go back to the guy and get the right (adjustable jet) or get out the drill and start hacking.
Kenny was right on page 1 and page 2. You have some Frankencarb that is not as the factory intended.
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Tecumseh Carb.jpg -
Tecumseh Carbs.jpg
Ok well the guy said he has has a carb he pulled off a 10hp vertical tecumshe, he said it is adjustable, should i try that one? Or do you think i could just swap the jet? Id, prefer to keep the carb i have and install a bigger jet only becuase the carb that is on it looks very nice and I KNOW IS PERFECTLY REBUILT!
Linksep
New member
Take your carb off, take the jet out, bring everything over to Guy's house, compare. You may simply be able to switch your fixed-jet for the adjustable jet out of the other carb. That's assuming the fixed jet didn't damage the carb body or emulsion tube.
If there's any damage to your carb or you can't figure out how to switch his adjustable jet into your carb take the other carb. There's all of about 8 parts in these carbs and 99% of the time they don't need "rebuilding" anyway...a simple clean & adjust will make almost any small engine carb perform like new.
If there's any damage to your carb or you can't figure out how to switch his adjustable jet into your carb take the other carb. There's all of about 8 parts in these carbs and 99% of the time they don't need "rebuilding" anyway...a simple clean & adjust will make almost any small engine carb perform like new.
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