Background:
861 was running a little rough and very wet leaky carb. Belches/backfires through the carb when giving it gas. Rebuilt carb and replaced graphite wires and new points and IC14 coil. Pulled and cleaned distributor. Timing is right, confirmed with light.
Idles OK and runs high rpm OK. But, giving it gas rapidly at any speed still causes a belch or two or three through the carb. GB in MT and I have conferred and looked at pictures, etc. We believe the carb is setup OK and rebuilt properly. So next we discussed checking the vacuum.
Vacuum is 17 inches, but I do have a needle bounce. And if I give it gas quickly the vacuum drops to 0-5 inches before recovering. AH HA! So I'm pretty sure that there is a valve issue causing the belch.
Oh...have 20 lbs oil pressure at idle, 40 lbs if 1000 rpm or higher. Not sure about oil pressure when working it. Haven't gotten that far. So had no plans to go into engine, if it can be avoided.
Tin and gas tank are coming off for cleaning, wiring and paint anyway. [b:4fac2a7575]So how much, if anything can I do with valves without pulling the head? I'm guessing adjusting, but that may be it?
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861 was running a little rough and very wet leaky carb. Belches/backfires through the carb when giving it gas. Rebuilt carb and replaced graphite wires and new points and IC14 coil. Pulled and cleaned distributor. Timing is right, confirmed with light.
Idles OK and runs high rpm OK. But, giving it gas rapidly at any speed still causes a belch or two or three through the carb. GB in MT and I have conferred and looked at pictures, etc. We believe the carb is setup OK and rebuilt properly. So next we discussed checking the vacuum.
Vacuum is 17 inches, but I do have a needle bounce. And if I give it gas quickly the vacuum drops to 0-5 inches before recovering. AH HA! So I'm pretty sure that there is a valve issue causing the belch.
Oh...have 20 lbs oil pressure at idle, 40 lbs if 1000 rpm or higher. Not sure about oil pressure when working it. Haven't gotten that far. So had no plans to go into engine, if it can be avoided.
Tin and gas tank are coming off for cleaning, wiring and paint anyway. [b:4fac2a7575]So how much, if anything can I do with valves without pulling the head? I'm guessing adjusting, but that may be it?
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