The thick and thin gaskets supplied are for the pump side. Stick with the thin gasket on the SDC-37.
The metering side is the one with the diaphragm that has the metal disc riveted into it.
McCulloch Chain Saws
- Thread starter Bruce Hopf
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The thick and thin gaskets supplied are for the pump side. Stick with the thin gasket on the SDC-37.
The metering side is the one with the diaphragm that has the metal disc riveted into it.
I had the same problem with a Stihl spitting fuel out of a Walbro carb. This was after rebuilding the carb. I bought a carb pressure tester on Amazon and it showed leaking through the needle valve as well as the gasket. I had to double up the gasket on the needle value side to keep the diaphragm from pushing the needle valve open when tightening the cover. Worked great without the cover with one gasket. Pressure tester told the story.
Prayers for a quick recovery, Ed.
Ron
Ron
McCullochfiremen47
Sorta Mechanic
.
best wishes and a speedy recovery
quick question on Flat Back Primer. Is below assembly right or do I have the part with the hole wrong way. I figured out an way to get this out with out buggering it up. And does "O" ring go there? Really questioning why its there as it floats.
I drilled and tapped a 10/32 hole in end and pressed the whole thing out with a long 10/32 bolt.
Now just to get the one part in right direction
I drilled and tapped a 10/32 hole in end and pressed the whole thing out with a long 10/32 bolt.
Now just to get the one part in right direction
Heal up quick!!!
Thank you fossil,
Understood, and yes I stuck with the thinner of the gaskets on the pump side. Metering side is fine. Still spitting. Both Welch plugs are damaged. I don’t know if these damaged plugs are causing a rich condition or fuel spit out.
Interesting, thank you Joe. I have another metering side gasket to try.
Thanks everyone for your well wishes & prayers! Doc told me today that it'll take 3-4 months before I'll be able to do things without having an excess of pain.I was hoping to get out cutting this fall,but it's not looking very promising.
You gonna have wood for heat?
Rocker59
ArboristSite Member
Could be a check valve issue also. Half of the plugs I've seen have a round indentation (about half the size of the plug) in them. This is from the punch used to expand them. I've also seen them set with a chisel/screwdriver. If you remove the welch plugs, remember to take the Lo and Hi needles out first. You can damage the Hi needle very easily if you don't.
Stupid question, but have you checked and made sure your metering lever is set to the right height?
Thank you fossil for the info. However, I was just back in that carb and changed the metering needle. I didn’t initially change it when kitting the carb because the hold down screw was aweful tight. Well I got it out and the tip of the needle had a large groove worn in. New needle in, readjusted lever height and I will try saw again.
Sorry, Rocker 59, thank you for the info!
I’m trying everything before I screw with those plugs! I read many old postings on here about the sdc37. Seems to have a pretty good reputation
Fingers crossed I got this carb problem licked. Grateful for the opportunity to work on these great saws.
knightmax
"Ya Don't Know What Ya Don't Know"
Remember just the other day when I said about the 10-10S...."It MAY be the cleanest unrestored saw I have ever seen in person that was not still NIB NOS."?
Well here gentlemen we have a contender for the title in this PM700...
Well here gentlemen we have a contender for the title in this PM700...
No way that's been used!!!!!?????
Awesome saw.
I've got plenty of wood for heat.I just wanted to go out cutting this fall.I only got about 12 cord in this spring,plus what I had left from last yr. - about 25 cord.I like to keep 2 yrs.ahead.
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