Question about Garden
I have a 6 cylinder car carby fitted to a victa push mower, with reduction in air inlet & manifold sizes. mower starts ok no fuel supply problems but will only run on full choke. Any suggestions/solutions ?
Why you have a car carburetor fitted to a mower troubles me... I think you'll find you don't gain any power increases by having such a large carbie on there, if anything you'll simply flood the engine with air or fuel and will have great difficulty maintaining a stoichiometric ratio.
The fact that the motor will only run on choke indicated that it is getting too much air without choke, and not enough fuel. This would be due to the intake size being still too large and probably a restriction in the venturi flow near the jets causing lack of suction to draw fuel from the bowl which would be due to the mower engine not creating the same vacuum as a car engine.
My honest suggestion?
Put a Victa carbie back on it, it's probably not going to work...
If you want it to run harder, adjust the throttle assembly to rev harder, or change the governor position.
Posted on Nov 19, 2013
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Posted on Jan 02, 2017
SOURCE: I have a Brigs&Straton 6.5 Quantum lawnmower will not stay running. I can keep it running by restricting the amount of air entering the carb with my finger (choking it) The mower will start if it
the problem is in your carb.,at the bottem of the carb. there is a bolt that threads in to the carb.pinch off the fuel line so that no fuel comes out after the fuel bowl is off the mower.now look into the bolt that you took off.there should be a hole oppisit the head of the bolt.there are also two holes that go through the sides.these holes are the fuel intake to the carb,the hole in the center is the fuel nozzle.most likely you have dirt blocking this hole and not letting the motor get enough fuel to run.thake some carb cleaner and spray it in the hole.take an air hose then blow the nozzle out.while you have the screw out take the bowl off and check to see if there is any water or dirt in the bowl.after cleaning.reinstall the bowl and start mower again.should be running ok now.if not let me know and i'll guide you through another fix.let me know if this helped or not................
Posted on Jun 02, 2009
Hi Dave, it sounds crazy, but try this. Check your gas cap. It could be clogged, causing a vacuum to occur in the tank, and therefore not allowing the carb. to take on gas. It usually take 10-15 min. for this to occur. The next time you run the mower and it starts to stall out, loosen the gas cap and see if it begins to run again. If it does, then you know that the gas cap is clogged.
Posted on Jun 05, 2009
take off the bowl of carb....the main jet is clogged ....remove it with a screwdriver...a small piece of wire will work as something to clean it out.....clean the whole carb....fixed many of them...
Posted on Aug 24, 2009
that's not a choke lever, it's used as a speed control on some models. the two springs are attached to the governor rod, which is attached to an "air vane" governor - on these engines, you need to keep the gas tank fairly full at all times, the dip tube on the carburetor rides up off the bottom of the gas tank, if fuel level goes lower than this tube, it won't pull any gas to the intake - from your descriptions, though, it sounds like the diapragm between the carb and gas tank has "curled". briggs had a service flash on the problem and since it's new, you should take it to a shop that does briggs warranty work - it should be covered under warranty
Posted on Aug 28, 2009
A: Backfiring (and misfiring in general) can be caused by a large number of problems; unfortunately not only you do not even say what kind of Fulvia you have but your description of backfiring is superficial. You certainly have not attempted to exclude some obvious causes of backfiring. With these limitations I can only try to list a number of potential causes and how to solve them.
Posted on Apr 08, 2010
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Turn the fuel supply valve to OFF and then remove the air cleaner and backplate, cut the clamp and disconnect the fuel hose from the fuel inlet fitting, detach the enrichener knob assembly from its bracket between the cylinder heads, disconnect the throttle cables from the carburetor, disconnect the fuel overflow/drain hose from the fuel overflow fitting, remove the enrichener cable assembly, enrichener valve and spring. (on California models only, disconnect the canister purge hose from the fitting on the carburetor body), remove the fuel tank and pull the carburetor free of the intake manifold. If removing the intake manifold, remove the four manifold mounting screws, remove the intake manifold, the seal ring, the mounting flanges and the two intake manifold seals. If removing the MAP sensor remove its screw, the MAP sensor clip and the MAP sensor itself.
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