Fuel pump

Phineas

Member
How often should the fuel pump be replaced on a purple plate clone engine?
Or do you just wait till it breaks?
 
I'd say if it ain't broke - don't fix it.

Not real comforting when you're running big shows or for points, I know, but it's a chance most take.
I've seen brand new fuel pumps fail too, so there's no extra level of comfort in bolting a new one on before a big race.


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Thanks and God bless,
Brian Carlson
Carlson Racing Engines
Vector Cutz
www.CarlsonMotorsports.com
28 years of service to the karting industry
Linden, IN
765-339-4407
bcarlson@CarlsonMotorsports.com
 
I start the season with a new pump and replace it about half way through the season. Cheap insurance. I have not seen new ones fail but Brian works on a much greater numbers than I do so I don't doubt what he says at all. I use the Briggs pump on everything too.
 
Yea, Gab, with the B&S pump I have not seen any new ones fail...I was referring to the little square after market pumps. I believe that WMS is selling them now as a replacement for the Wip22/23 pumps.
What I have seen is that some leak (easily fixed with tightening the assembly bolts) or there is a piece of trash (plastic) caught in the pump that prevents it from moving. Again, easily fixed or simply toss it as inexpensive as they are.

Generally, these pumps are very efficient and don't just go bad on their own. If they get a bit weaker over time, they're still overkill as far as how much fuel they move.

A quick way to determine if the pump is working is to pull the fuel line off at the carb. inlet and try to start the engine. The fuel should shoot out of the end of the fuel line, (not just a dribble.) Now, that's not to say that you don't have a line kinked, fuel shut -ff problem, filter plugged, pick-up in the tank problem...but if you've got good fuel pressure at the carb. inlet, you know that everything before that is working as it should. ;)
 
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