JRobinson
ArboristSite Lurker
Well if you're saying the adjustment screw felt loose the pump may have come apart. The adjuster screw is what holds the plunger in the pump, it adjusts by limiting how far the plunger can move back & forth. If the crossbar is stuck it probably froze up and melted the gear (it has a worm gear molded onto it that drives the pump). I've had those pumps apart and put them back together again, but I think they're only sold as a unit. You may need a new pump and the gear that drives it (the crossbar thing), while you're at it check the needle bearing with the clutch drum in place - it's OK if it slides back & forth but it shouldn't rock much on the shaft at all. If it does, grab a new bearing for it too.
Those pumps are a bear to change out without removing the brake band because of the brass tube that snakes around behind it. It can be done, you just have to figure out the right way to twist it around (holding your mouth just right helps too . Removing the brake band is a pain as well because of the spring (reassembly), it may still be the easiest way to go though. I can't remember the exact damages on a parts list like that, but worst case scenario maybe $75 bucks or so?
good luck,
Jim
EDIT: One word of caution, don't run the saw with the screws that hold the oiler removed, they go straight into the crankcase and without them in their holes you have a massive air leak. It doesn't hurt to put a little sealant on them when you put it back together, I always doped them up with a little HondaBond just to make sure they didn't leak.
Those pumps are a bear to change out without removing the brake band because of the brass tube that snakes around behind it. It can be done, you just have to figure out the right way to twist it around (holding your mouth just right helps too . Removing the brake band is a pain as well because of the spring (reassembly), it may still be the easiest way to go though. I can't remember the exact damages on a parts list like that, but worst case scenario maybe $75 bucks or so?
good luck,
Jim
EDIT: One word of caution, don't run the saw with the screws that hold the oiler removed, they go straight into the crankcase and without them in their holes you have a massive air leak. It doesn't hurt to put a little sealant on them when you put it back together, I always doped them up with a little HondaBond just to make sure they didn't leak.
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