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Post by kngamble on Dec 12, 2023 8:06:49 GMT -5
Hi Guys! My first post but I’ve been reading what’s been written about these carbs acting up. This carb will run fuel out of the bore and will only start when cold. I have put 2 kits in it. The needle arm is set flush with the surface of the carb body and the low speed is adjusted less than a 1/4 turn out. The only kit I could find are the ones made in China. I suspect that the metering needle is not seating properly. Any ideas or experience with the same problem would be greatly appreciated! Thanks in advance for any help!
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Post by bobby167 on Dec 12, 2023 11:16:26 GMT -5
Check the nub on the diaphragm with the old one. Those china kits are,most of the time,longer. The kit should be a K10-HDC, if it is a Walbro carb and has not been changed.
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Post by footstep on Dec 14, 2023 9:58:02 GMT -5
Check the nub on the diaphragm with the old one. Those china kits are,most of the time,longer. The kit should be a K10-HDC, if it is a Walbro carb and has not been changed. Agree with Bobby, Never use the china kits, I know some guys have had good results with them, but most have had the same problem, use the walbro kit, you can find them on cheater bay for cheap & have the Dom printed on the bag, also make sure you have the gasket & diaphragm placed in the proper orientation. If you still have the old parts measure the nub & file it down to spec. |
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Post by kngamble on Dec 31, 2023 9:03:41 GMT -5
Thanks for all the advice! Happy New Year!
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okie
Saw Builder
Posts: 199
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Post by okie on Jan 1, 2024 16:15:38 GMT -5
You might also think about doing the input pressure test using a blood pressure bulb or a mity/vac.
You can lots of info on-line and on this site about pressure testing walbro carbs.
Leons has a good video also.
If the input needle is leaking it will not hold 3-5 lbs of pressure.
A pressure test can also reveal other things.
A blood pressure bult and gauge can be acquired for less than $20
A Mityvac 8500 can be review, is more costly, but if you tinker very much well worth the money. I've had a mity/vac for years. i use a inline Briggs red gas filter when doing vac tests to keep small crud from being sucked inside to the check valves.
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