Angelo

I’m chasing a lean condition. If I pull choke halfway out she runs good and can throttle it up no problem. If you take choke off and try to rev she hesitates bad. Temp is good. Has new fuel pump, rebuilt carb, fresh fuel filters. not sure what else it could be. I noticed these were open not sure if they are closing when warm. Definitely something to investigate. Didn’t notice any vacuum leaks gonna get into that alittle more too. Maybe I have air leaking in some where. It’s driving me crazy. Might try to crack a whiper vacuum line and put meter on it see what it’s pulling. When it off for while the whispers sag down soon as you start it they shoot right up so thinking my vacuum is good

I don’t think so I’m gonna take carb off again and mess around with it a bit

That’s what I thought too mower man . I had carb rebuilt noticed truck was cold and it’s wide open. I’m gonna heat it and see what it does but I believe it might be closing on me when warm and causing all my issues.

Carb plate between intake and carb on 707b which I believe was there to prevent freeze up during warm ups. It’s wide open when cold. Is that right? Everything in my head says no

When cold should the butterflies be open or closed?

Had dynamic carb in Mount Vernon ny. He’s old school guy that does a lot of old and rare carbs. My fuel is fresh, good pressure. I’m wondering if my advance weights are stuck in distributor. It idles great but starts breaking up when you get into pedal

1952 Mack l85 . I have rebuilt carb. New fuel pump with 4lbs at carb. Good fuel. Still breaks up when throttling up. New plugs,wires, points etc . Is there a timing advance in distributors. Maybe it’s stuck. I know there is no vacuum lines to them so how do they operate. Anyone have a clue?

Thanks mower man

What motor do you have d-day

My 1952 L85 750gpm pumper has champion d21 plugs in it. Not sure if that’s correct and can’t seem to find that info. Anyone have a clue what the 707b was supposed to have in it or what do you run? Thanks

I didn’t find any vacuum leaks so far. The distributors don’t appear to have weighted advances or vacuum lines going to them. That’s what confuses me. How the heck is the ignition advancing

I’m wondering that too.my truck has a hesitation and stumbles a bit. Did fuel system, carb pump already. I’m not sure how old my ignition stuff is or if it was ever installed properly so I’m doing plugs, wires, codensor points cap and rotor on my 52 L85 707b. How do you time this thing I’m lost. Anyone that can help?

I have no issue with upgrading but what would I need to do so. I want something that appears as original as can be. Do I need to change hubs, what kind and size of new rims etc. thanks guys

I have 9.00-20 tires on my engine. They are brand new but dry rotted due to age and sitting. Anyone have a lead on replacements. No one I called even wants to touch it with 10ft pole. Is there something that looks and fits similar?

I have 9.00-20 tires on my engine. They are brand new but dry rotted due to age and sitting. Anyone have a lead on replacements. No one I called even wants to touch it with 10ft pole

Made my own gaskets and she’s running. Not great but running. Sitting for 20 years she finally has life

Got one from cal little and installed gonna try to fire it up for first time tomorrow

Can someone explain to me what the difference is between the 707a,707b,707c . I have lead on water pump for my 52 L model but it’s out of 707c and I’m not sure if it’s all the same. Thanks

Looking for a lead on a water pump for my 707b gas engine. Was taken off rig before I got it and it’s gone. Does anyone have or know where I can locate one please