99 25hp Bigfoot shuts down at 3/4 throttle

[jayislandR]

Just had the carb cleaned by mechanic after a general check up and first run on the water and she starts & runs solid and effortlessly as usual. UNTIL I run it past 3/4 way open. Thats when it runs for about a minute and with no indication at all and shuts down altogether abruptly. Warning horn does not go off. Then starts up immeditately after like nothing happened at all and ready for more. Tell tale stream is strong and cool. Must be carb related or fuel pump related? Back to the mechanic I go....

 

[Tido25]

Re: 99 25hp Bigfoot shuts down at 3/4 throttle

Hey go look at my post about my 90 elpto I'm not sure if it will help but my motor had the all messed up at 3 shops

 

[CharlieB]

Re: 99 25hp Bigfoot shuts down at 3/4 throttle

Fuel pump or restriction in the fuel supply somewhere and just can't pass enough gas, runs out of fuel when demand is greater than supply.

Check all hoses, fittings, loose clamps, from the pick-up tube in the tank to the carbs.

 

[RobinL]

Re: 99 25hp Bigfoot shuts down at 3/4 throttle

I had a problem with our 2001 Bigfoot - any attempt to run over 2500 - 2800 RPM would result in stalling as if short of fuel. Cleaned out everything multiple times, including carb, with no improvement. Found adequate fuel flow to carb. Tried cleaning the carb again, and this time used compressed air to blow through everything - and Bingo it works. Be careful when dismantling the carb- there are small parts which fall out. Also, there are some VERY small holes in some internal passages, which are easily blocked.