Six Pack issues and rebuilding by tommyg29

3 minute(s) of a 193 minute read

9-21-2014

Not sure, its somewhere in this thread but I think I have 13-14 lbs vacuum.

The numbers are hard to read but I think I had and have a 6.5 PV. I noticed the new PV was not threaded in tight. I was able to unscrew it with my fingers.

So, if you suck on the back side of the PV it should start compressing the spring and opening the valve with more vacuum, or does compressing the spring shut the PV? I would think more vacuum would open it, and normal state is closed.

Regardless, I cant operate it with the 5 pounds vacuum my vacuum cleaner sucks (I measured it with my vacuum gauge)

I just put my old PV back in and tightened it in good this time and will try again after the game  

Things may be making sense now, and if this fixes it I am pissed at myself for not catching that before now.

9-27-2014

Thanks for the offer, but

I think I am back on track now and getting closer  

Got it to finally idle and it isnt dumping fuel anymore. I think it was a loose PV.

Have the outboards mounted but not connected, and it is idling, but, as it warms up after a minute or two it starts smoking out the exhaust more and more. Then I shut it down and let it sit 20 minutes and start it up again, and did this routine several times today. Each time it seemed to idle OK. I set it at about 950 rpm. Hard to read but I think initial timing is in the 12-15 degree range. Idle needles about 3/4 to one turn out, and vacuum now seems about 8 inches at idle.

Problems are twofold for now:

First, after the first 30-45 seconds of running the exhaust starts smoking, and seems to get worse and worse the longer I leave it running. I am hoping this is just raw gas that probably was sitting in the exhaust. Hopefully this issue will fix itself but....?

Second, it is still dieseling badly each time I shut it off, and a few times it seemed to just cough and shut itself off after a few minutes idling. After I started it the first time today it had one huge flaming backfire belch out the carb. Hope the PV is still OK.

Not that I care for now, but my dash tach (an upgraded digital unit I think from 10 years ago) reads about 50% faster than the timing light tach. MSD issues I guess.