redunshee
Addicted to ArboristSite
Here's why it's good to replace welch plugs, Bob. This is an HL-84A from a Poulan model K bowsaw I'm working on. You can see than blob of nasty looking stuff underneath where the welch plug was. (Large orifice near the top.) I didn't use to replace them but do more often than not now. Just have to be careful punching through the plug to as not to damage anything underneath. I personally like to use a drill press with a small bit. For me, it's easier to control pressure so as not to do damage.
<a href="http://s672.photobucket.com/albums/vv89/67Mustang/?action=view¤t=DSCN0809.jpg" target="_blank"><img src="http://i672.photobucket.com/albums/vv89/67Mustang/DSCN0809.jpg" border="0" alt="Under welch plug"></a>
BTW, don't know if this carb is going to make it. You can see the pitting in it from years sitting with old gas and moisture in it. Several other serious issues to deal with on this saw as well. No fire for one.
Steve
Maybe I'll replace the plugs on the carb I took off my Dayton. I have a small drill and will use a small bit and be careful. I read that there is a lo and hi welch plug and if the high is plugged it would affect high speed operation. Maybe that's why the saw will idle great but no accelerate. I'll give it a shot.
I did do a complete pressure test on the carb and it passed. This included doing a test with the LO speed screw turned in and alternatively with the Hi speed screw turned in. If you quickly depress the metering diaphragm through the cover, the pressure should drop a bit and then hold as the metering side gets pressurized. That signifys that the needle is opening properly. Welch plugs are my only recourse left.
Bob