272super
ArboristSite Operative
The 254xp uses the Walbro HDA 35 carb. I was curious about the operation of the semi fixed jet(kit#503 59 27 50). I've had a few of these saws not want to rev to max rpm- even with the H screw all the way in. I've got one right now that won't rev past 13,100 rpm (spec is 13,800 max) with the screw all way in. The semi fixed jet can leak and provide too much fuel to the point that the saw cannot lean out enough to rev out to max rpm. Can I plug this jet?
In the past,I have replaced this jet along with new o-ring and clip and that solved the problem but I don't really understand where the leak was coming from since the old jet/o-ring looked fine. I guess the o-ring or jet could have been worn more than the naked eye could see. With the 254xp and the Hda 35 carb, I know some have had issues with the saw not wanting to rev out because of a rich condition in the carb. How did you fix the problem? It could also be a metering lever issue I guess,but I have not had any luck with changing lever height. Thanks for any input.
In the past,I have replaced this jet along with new o-ring and clip and that solved the problem but I don't really understand where the leak was coming from since the old jet/o-ring looked fine. I guess the o-ring or jet could have been worn more than the naked eye could see. With the 254xp and the Hda 35 carb, I know some have had issues with the saw not wanting to rev out because of a rich condition in the carb. How did you fix the problem? It could also be a metering lever issue I guess,but I have not had any luck with changing lever height. Thanks for any input.
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