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Discussion Starter · #1 ·
i have a 420 rancher fuel injected and its got a little backfiring when i let off and the spark plug tells me its running a litte lean is the procom powerjet a good option or should i look for something else?
 

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Are you sure its that are does your exhaust need new packing??
 

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I bought a used 420 several years ago that would pop every once in a while. It sat unused for some time. I just ran some seafoam in the gas and it seemed to get much better.
 

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Even tho it's a stock exhaust they do need re packing after a while


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if it's made by procom its probably junk.

all the EFI machines tend to run a little lean anyway, but if its a new problem maybe check to see if your air filter is still intact or maybe if there is an intake leak or something.

The exhaust on a utility is not serviceable, there is no packing in it only baffles. I don't know if sports are different??
 
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