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Backfiring through carb and no start - Honda 3000 Watt Portable Generator

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Quad backfires while trying to start ,but wont start,any ideas?


Make sure you don't have a leak around manifold side of boot

May 16, 2014 | kawasaki KLX 110 Motorcycles

1 Answer

Had carbs rebuilt and suppose synced but bike starts hard and when running backfires whin you let off the throttle


1. choke circuits still plugged up or carbs not cleaned correctly; most people that attempt to clean their own carbs do not have the proper equipment to do it with. Most carbs have really small orifice(jets) and require really small jet drills/orifice cleaners to clear them out. Cleaning them in a caustic soak tank will clean them out but the carbs must be taken completely apart or it will damage any gaskets or rubbers parts left in it. Carb cleaning should be left to professionals unless one has experience doing it.

2. Open/broken vacuum lines can make it hard to start and backfire when letting off the throttle; jets that are not cleaned out correctly can also make it backfire.

3. If the backside of the inlet grommets are not sealed at the flange and have a vacuum leak, that will cause hard starting and backfire also; this applies to carbs with a flange style grommet. If the intake grommets are cracked or leaking it too will cause hard starting and backfire. Remove the carbs, wipe the head and mating flange surfaces with laquer thinner, let it dry and then reseal the grommets back to the head with rtv silicone rubber. Make sure to wipe any excess rtv(before it drys) from down inside the port before putting the carbs back on.

Feb 20, 2013 | Honda F6 C Valkyrie Motorcycles

1 Answer

Hard to start then backfires through carb


Backfire through carb often means timing too advanced.

Mar 13, 2012 | 1993 Harley Davidson XLH Sportster 883...

3 Answers

Craftsman lawn tractor 917.271060w/kohler 15.5 hp engine cranks but backfires thru carb and wont start.


my 15 hp kohler engine backfired while i was using it, now it wont crank and backfires thru carb

Oct 10, 2010 | Craftsman Garden

1 Answer

I have a Ski doo 583 RAVE motor theat backfires


It sounds like you have a reed problem they should be in a "cage" just behind the carbs on the cylinder and if they were missing a piece or if they were cracked it would cause the engine to backfire. If they are in good condition they should close against the cage and stop the back pressure coming through the carbs.

Jan 21, 2010 | Sport & Outdoor - Others

1 Answer

Bike is backfiring through carb.


do u have the correct spark plug the one recommended by the manufacturer

Aug 02, 2009 | 2001 Harley Davidson FXDXT Dyna Super...

2 Answers

Hesitation and backfiring


sounds like maybe you have some trash in your fuel tank. Try changing the fuel filter and cleaning the carb. If the problem persists, you may have to drop the fuel tank and have it cleaned out.

Jul 16, 2009 | 1988 Chevrolet Monte Carlo

1 Answer

Four wheeler back fires


If the motor has two carbs then balance the carbs. Balancing the carbs basically means being certain the slides on both carbs open up simultaneously. If one carb opens sooner than the other then it 'drives' the other carb and can cause the backfire. Other things can can cause a backfire but lets start here first.

Mar 13, 2009 | 2003 Yamaha YZ 250

1 Answer

Samurai backfire


It sounds more like a timing problem. If it backfires through the carb that means the intake valve is open when the spark plug fires. Same with the exaust but it the exhaust valve that is open.

Dec 14, 2008 | 1986 Suzuki Samurai

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