Hi all,
First post here by new member, am excited by all the amazing information on here, looking forward to learning and sharing...
I have a GX120 on a plate compactor, it starts first pull and idles nicely but has trouble under load, doesn't seem to develop full power.
With the engine uncoupled it seems to rev up quite well, and the spark plug is a good colour. I have been looking at the governor arm, because somebody else messed with it (true story) trying to fix this power problem, so I have been trying to get it back to basics, mostly then to figure out if there is a problem with the motor or maybe with the compactor vibrator unit itself.
I found the governor fiddly to set, and even now I don't have it right. Very minor tweak on the shaft/clamp will change behaviour from "won't idle" to "won't speed up". I got it to a point where it won't quite idle, but I can pull back on the arm by hand against the spring to make it idle, this is better than knowingly having it not reaching a good high speed. With the governor set like that I put the motor back onto the machine, but as soon as it is asked to load-up it lags and stalls, suggesting not enough fuel available, even if I push the governor arm to make sure the butterfly is full open.
So, without much load (just a clutch pulley) it will rev ok, but when asked to load-up it does not perform.
Would love to hear folks ideas on what this might be...
cheers, Brian
