NH.Solar |
05-23-2021 07:18 PM |
First shut off the gas supply if you have a valve. On the bottom of the carburetor there will be a bowl and at the bottom center of that there will be a nut with an adjustment needle, this is the main mixture ratio adjustment. Hold the bowl up in place and remove the needle assembly using, I think, a 9/16 wrench. If then bowl can be kept in place it will avoid you needing to replace the bowl to carb gasket and should stay there on its own.
Now, with the needle and nut assembly in hand, screw out the needle, spring and o-ring at the top of the spring. The now bare nut piece will consist of the nut and a threaded portion above it. Look in the area near where it transitions from nut to thread for a hole about the size of a pencil lead, this is where the carb picks up gas from the bowl for metering. Now go directly up from the hole and look for a much smaller hole in the threaded portion, this will be the metered hole that is adjusted by the mixture needle and most likely where you might find a blockage of green varnish. Clean it out with by running a manila tag wire through it and flushing it our with carb cleaner. Put everything back together and set the main mixture needle initially at two turns out. Once the engine has started and warmed up for a few minutes set it at wide open and then turn the main mixture needle in and out until you hear it running most perfectly. I then usually open it up just a tad (1/16th of a turn) to accommodate the extra fuel needed to accelerate. Next turn adjust the idle stop to the point you like best, and then adjust the idle mixture screw (the horizontal screw going into the side of the carb body) by turning it out until you hear the rpms drop, and then turning it in until you hear the rpms drop, and then setting it in the middle. That's it! Your problem will likely be just a bit of varnish no the small metering hole of the main jet assembly and this will be just a five minute fix. Get those peas in this week!
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