briggs fuel pump issue

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kjinohio

Member
Using a Briggs engine on a wood splitter I built. About a 2 years ago the original fuel pump quit so I got a new OEM Mikuni. Put it on and worked fine. A year later, it went out again. Once again, bought an OEM and worked fine for a spitting job I had. Went to start it today and after that one time use, it's dead again. This time I've ordered a knockoff brand but want to know what brand/model of electric would be good to use if this one dies as well? Been VERY frustrating. The original pump worked fine for 8 years with no issues. I do run ethanol fuel but to die after a single use points to factory issues.Anyone else run into this? It's a 25 HP Briggs and a 808656 Fuel pump.

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Please post the model, type and code numbers from the engine. That way we will know the exact engine you are dealing with.
 
It's a Briggs Intek V twin 25 HP engine. Model 445777, type 0231 E1, Code 03102240. Mikuni pump # is 027013 with Briggs # being 808656. Line from tank gravity feeds out quickly, no obstructions. Engine runs perfect with gas or either sprayed into air inlet. Pump is used on a lot of engines. It's just not pumping anything no matter how much it is cranked. Fuel delivery issue.

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Google "HEP-02A" or "EP-500-0". Now you will need new fuel lines as these are 5/16 fittings and a little oil or soap to get the 1/4" lines on with appropriate clamps. Plus you would need to find a way to mount it securely.
 
It's worth doing a thorough check of the impulse line as Andrew suggests. If that line has even a hairline crack or is partially blocked, the diaphragm never gets the pressure pulse it needs to operate. A damaged impulse port on the engine block could also be causing repeated pump failures rather than the pumps themselves being defective out of the box. Also, seconding the HEP-02A suggestion from StarTech. Just keep the output pressure at or below 4 psi. The Intek carb doesn't need much, and too much pressure will flood it. Wire it to a switched 12V source so it only runs when the key is on.
 
FixItFrank said:
It's worth doing a thorough check of the impulse line as Andrew suggests. If that line has even a hairline crack or is partially blocked, the diaphragm never gets the pressure pulse it needs to operate. A damaged impulse port on the engine block could also be causing repeated pump failures rather than the pumps themselves being defective out of the box. Also, seconding the HEP-02A suggestion from StarTech. Just keep the output pressure at or below 4 psi. The Intek carb doesn't need much, and too much pressure will flood it. Wire it to a switched 12V source so it only runs when the key is on.
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Mikuni makes great carburetors and fuel pumps. You need to check impulse line and fuel lines as stated previously.
 
And it can be a fuel tank venting issue too. When the pump doesn't work check the in fuel line for a vacuum. Recently had a JD X310 when the fuel tank vent valve became inoperative. Instead taking everything apart I just installed a vented fuel cap. IE I took the non-vented fuel cap and changed it to a vented cap like on the X360 sitting beside it.

Also there have been a problem with these vacuum operated pumps which the internal check valves are curling up and no longer are one way valves. After markets are especially prone to this problem.
 
I popped the fuel tank lid opened and cranked and nothing. poured some gas in and ran fine till it burned that off and then died. No gas drawn by pump. I then went to the impulse line. It does spin very easily on the cover. I removed it and pulled a vacuum and it holds. Could it be it is too loose on the metal cover and leaking there? Anyone have a part #? New pump should arrive today.
 
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