Question about Yamaha Electrical Supplies

Open Question

Yamaha EF4600DE Generator Help needed

Pop's and coughs when put under a load. Even just shutting the ECONO switch off so the engine will rev up. Carb completely rebuilt. If I put under a load or shut the econo switch off while holding the governor arm and slowly release the governor arm it will run fine. But if the governor arm moves quickly, it starts to cough and pop like the timing were off on an old chevy V8. Should the vaccum break release slowly?

Posted by John Bemis on

Ad

4 Related Answers

Anonymous

  • 63 Answers

SOURCE: generator hard to start and backfiring

Sound like you've done things in the correct order, tecumseh's are notorious for carb problems if you let as sit in them. Backfiring is timing related (flywheel key) or valve problems. I would take a closer look at the exhaust valve I don't believe it is closing all the way.

Posted on Mar 16, 2009

Ad
ILikeBMW

ILikeBMW

  • 117 Answers

SOURCE: engine won't maintain constant rpm

Hello There

Try cleaning or replacing the spark olug.

Hope this helps.

Many Thanks

Posted on May 22, 2009

Ad

Anonymous

  • 1 Answer

SOURCE: kohler lp shuts down

What you need to know is there enough fuel going to the regulator. It should be 7 to 11 inches Water Column. If not your problem may be not enough fuel. That includes when the heater in your house kicks on and what ever gas appliance you may have. Once you verify that you need to figure out if you have the proper pressure coming out of the regular on the inside of the generator. Next I would look at compression of the cylinders. It may need new piston rings.

Posted on Oct 09, 2009

Anonymous

  • 151 Answers

SOURCE: Troy-Bilt 5550 generator. After starting if I move

improper setting in the fuel needles of the carb. what size is the engine? brand?

Posted on Dec 24, 2009

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Honda 3000is runs great on eco but hesitates and either stops the load source or stops running itself when under load.


Sounds like the throttle control motor is not adjusting the engine speed to compensate for the load. Does the generator rev up to full speed if you turn OFF eco with NO load?
Funny thing, I have one on my workbench that is doing pretty much the same thing. Runs on eco, revs up with eco off with no load, coughs, sputters and dies with a load in either mode. I will update with what I find when I figure it out in the next week or so. Have a new carb on order.

I swapped the carb and it made no difference. Still backfiring (rather dramatically) and won't stay running. I see on some other posts that Valve lash will cause this. It makes total sense as the exhaust valve gap actually tightens as the engine wears which would keep the exhaust valve slightly open when it ain't supposed to be allowing raw fuel to enter the muffler.
With this one I can believe it as it has a ton of hours on it and I know they have never been adjusted.
I will try to get a chance to do it over the weekend and update this post when I do.

Apr 01, 2015 | Honda EU3000iS Inverter Generator

1 Answer

Rebuilt a Stihl TS400 concrete saw, and now it wont cut, the engine dies down and has no power but revs up? Ive tried everything!


All these people are missing a basic thing: check the compression. If you did all thus work yourself, you may have reused the head gasket or not installed the new one correctly. It will run with no load, but once force in exerted, the pressure finds the leak and exploits it. There is a reason 2-cycle engines run at 130-160 psi normally.

Dec 27, 2012 | Stihl Ts400 Cut Off Saw Carb Carburetor...

1 Answer

I have a 1999 suburban with a 5.7 vortec the engine wont build rpm while moving,but revs freely in nuetral or park.If the computer senses movement in forward or reverse the engine misses such as a rev...


The computer can't sense movement. An engine with worn spark plugs or bad coils can run perfectly fine at idle and begin misfire the second you put it into gear or under loads. Plugs/coils misfire most when under load. Have you checked them?

Oct 18, 2017 | 1997 Chevrolet Suburban

1 Answer

I have a murray 42 inch with a 15.5 briggs engine my engine is running up and down popping out of the intake i rebuilt the carb checked coil and plug gap i tried to adjust governer it helped some it w


Besides the missing o-ring from the carb which is probably important. The words 'popping out the intake' made me think 'flywheel key'.

Oct 24, 2012 | Murray Garden

1 Answer

Pops coughs and stalls when put under a load


Chk air pipes & filer, and plug/s, are clean.cheers

Aug 26, 2012 | Electrical Supplies

1 Answer

17.5hp OHV Briggs & Stratton w/ Nikki Carb sputters & backfires thru carb & muffler


Hi, run a number drill through the main jet. Even though you have carby cleaned it a thin layer of residue will remain on the walls of the jet. The problem you have is a lean misfire. Regards Phil.

Jun 11, 2012 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

1 Answer

2005 ktm 65 hesitates at mid rev under a load only


if the spark and compression are rite-then the fuel is at issue-jets need attention or float level ajust

Apr 08, 2012 | KTM Motorcycles

1 Answer

I am blowing the 20 amp fuse that appears to control the carb. seloniod. when I replace it with a 25 amp fuse it does not blow. The mower runs fine for abt 5 to 10 minutes then starts to bog down when the...


The fuel shut off solinoid should not blow a 20amp fuse, it function is to shut the fuel off to the main jet, so as to stop un burnt fuel being dragged into the muffler on the engine over run when switched off, which can them make a very large bang, so it is actually known as the anti fire solnoid, remove it from the carb bowl and check it springs in when the ignition is switched on, if it is stiff or does not go all the way back in, this will cause your engine running problems.

Jul 11, 2011 | Garden

Not finding what you are looking for?
Electrical Supplies Logo

Related Topics:

212 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Electrical Supplies Experts

Sheldon Dedek

Level 3 Expert

912 Answers

Dan Horsefield
Dan Horsefield

Level 2 Expert

287 Answers

Robert Wooley
Robert Wooley

Level 2 Expert

178 Answers

Are you a Yamaha Electrical Supply Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...