Fuel pump or no fuel pump?

PACub100 · Monday at 7:25 AM

My brother scored a 1541 for really cheap and transferred the Magnum engine over into his 782.
Now on trying to start it, he found gas and oil coming out of the carb. Long story short, I told him to check the crankcase and sure enough,gas in the oil so while he waits for the carb rebuild kit, he's doing some other work. In the meantime he mentioned that the fuel pump could be bad. It hadn't dawned on me that since he pulled the motor from a 1541, that it has a fuel pump.
I told him to bypass the pump and just run a line from the tank through an inline filter and a shutoff valve and straight to the carb. He's unsure.

My thinking is that the added pump will supply too much fuel since the fuel will naturally want to flow. Is this correct or will it make no difference?

gary noblit · Monday at 8:26 AM

Pac,if the tank is higher than carb it should be fine.I have grown fond of the small 12v fuel pumps,they seem to do a fine job. The needle and seat plus float makes a huge difference in operation..

mgonitzke · Monday at 9:19 AM

The bottom 1/4 of the tank is below the carb on an 82 series. The original engine had the same mechanical fuel pump the 1541 did.

For about the same price as a new OEM mechanical pump, a Facet 40177 electric pump is what I would recommend.

Red_108_puller · Tuesday at 8:14 AM

It depends, like he said, if the gas tank is higher than the carb. It also depends on whether you are planning on driving up steep hills or have a pretty flat area. My 108 doesn't have a fuel pump because it is a pulling tractor that drives on a straight track, but my dad's 582 and 1282 both have fuel pumps because he mows on a hill.

tkhoffman · Tuesday at 10:09 AM

Even if the gas tank is above the carburetor, the fuel pump, with the correct pressure, should not push thru the needle valve. As mentioned, the 782 tank is not 100% above the Carb. You need the pump.