Surging, no acceleration. B&G Fun Power 5HP

[daveofds]

Partial rebuild in progress. Replaced belt drive, primary sprocket, throttle cable, made adjustments for steering and too light front end. (Toe out front wheels, added weight to front of cart and lowered tire pressure.

Got the kart running yesterday. Started OK, died several times. Seems to run better with choke on lightest setting. Rode for 20 minutes.

Today…verry difficult to start. Shot a lot of carb cleaner in the intake to get it started. Idles rough now, surges, will not accelarate. Dies easily, fethering choke to keep running at idle. Applying throttle seems to have no effect. I did make sure the governor screw was locked all the way clockwise before riding it yesterday. With throttle wide open, just surges and low rpm. I have a video with sound but unable to attach due to restrictions.

 

[Denny]

Clean the carburetor. Sounds plugged up.

 

[Whitetrashrocker]

Or an intake leak.
Its getting too much air and not enough fuel to idle. Thats why it likes the choke on.

 

[Grizzlymi]

Yeah, clean the carb and check for air leak around the intake. Make sure gaskets are good.

 

[daveofds]

A new carb cost less than $25. But I can buy a whole new engine for less than $140.

https://www.amazon.com/gp/product/B098JLDZ3D/ref=ewc_pr_img_1?smid=A3FP93UKJYWCVU&th=1

Anyone ever put one of these on their kart? Reviews I've read say it is one step below a Predator in torque, smaller gas tank, and no idle adj on carb. Carb can be replaced.
A new predator is <$159 at Harbor Freight. I see a lot of these engines on Karts online.

6.5 HP (212cc) OHV Horizontal Shaft Gas Engine, EPA

Amazing deals on this 6.5Hp (212Cc) Horiz Shaft Gas Engine at Harbor Freight. Quality tools & low prices.

www.harborfreight.com

212 and 224 cc. 224 is $179.

 

[Whitetrashrocker]

And cleaning the carb costs pennies. A new gasket kit is a few dollars.

 

[Thepartsguy]

Predator 212cc is better more powerful and more reliable in every way.

Will actually start every time you want it to and can be hopped up for cheap and won’t kill reliability.

Briggs are crap but that won’t stop me from running them. 99% of people do not want to deal with a Briggs cause of how finicky they are just to start.

 

[Hellion]

Any China OHV engine should be good to go. There's several brands, Predator, Ironton (Northern Tool), PowerFist in Canada and various other brands you never heard of. Best deal is a Predator 212 IF it is on sale for $99.99 and there are more parts out there for it, actually designed for it, than any other engine brand. We're in the end of the year sales, I bet it will go on sale soon.

99% of people do not want to deal with a Briggs cause of how finicky they are just to start.

I have never really had a problem with them assuming it's a Pulsa-Jet carburetor. If the tank mounted bowl is empty (sitting several days), it takes a few pulls to fill it before it draw from the bowl and start. If the engine is cold and the bowl is full, it starts like a Predator, 1 or 2 pulls. Well it's usually 2; 1st pull on full choke and it coughs, 2nd pull choke off and it chugs to life.

Do what others said. Check the carb and the gaskets, the tank mounted carburetor is pretty unique since it is always pumping fuel and will work at angles that would stop a regular float carburetor. This site is indispensable:

Disassembly, Cleaning and Repair of Briggs Tank-mounted Pulsa-jet Fixed-jet Small Well Carburetor

outdoorpowerinfo.com

Otherwise they just seem to work if everything is serviceable. Granted, we are usually working with old engines suffering from years of neglect and most folks only want to give it the minimum effort before giving up and admitting defeat. If you check older posts it will amaze you that the denizens here recommended actually fixing things instead of buying a whole new engine...

I'd say 99% of people do not want to deal with anything.

[EDIT]: Check YouTube University on the surging problem.

 

[Denny]

I never heard of B&G engines before.