How to Fix Surging on Nikki Carburetors

Drill out the Pilot Jet!

On today's video, I'll be showing you how to fix surging on a Nikki Carburetor!

Why does my Snowblower Rev up and Down?

The issue is your "Pilot Circuit" or "Idle Jet" is too lean! (Not enough fuel going through the jet).

To fix this, we 1st need to remove, then disassemble the carburetor.

Once the carburetor is disassembled, we can then use a "Micro-Drill Bit Set" to carefully enlarge the Idle Jet.

This process is what's called "Trial & Error" as you will slowly be enlarging the Jet & then seeing how that affects your machine.

For example, we started at a Factory Setting of about 0.015" on the Pilot Jet, and enlarged it to a final size of 0.034"

It took me about 4 times to get it right, but once you have the right size Pilot Jet, your engine should run perfect!

Your engine may differ from mine, so please only use my video as a guide.

You DO NOT want to bore the jet out too large to begin with, because then your engine will run "Rich" (too much fuel).

If this happens, there is usually no way to fix it, other than by running a hotter spark plug. However, this can damage your engine if not done correctly, by a professional.

Tools Required: 10mm Socket, E5 socket, Phillips Screw Driver, Micro-Drill Bit Set!

Buy a set here: https://www.amazon.ca/gp/aw/d/B07Q1ND...

This works for almost all Briggs & Stratton, Nikki Carburetors: 796122 794593 793784 696737

Engine Model: 20M107 20M113 20M114 20M212 20M213 20M214 20M307 20M312 20M313 20M314 20M337 20M414 20A113 20A114 20A412 20A414 20B414 20C414 20D414 20E214 20G414 20P214 20P414 21M107 21M113 21M114 21M214 21M307 21M313 21M314 21M317 21M337 21M412 21M414 21M417 21A414 21B414 21C114 21C214 21C314 21P214

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