mackdump600@yahoo.com

Hi there’s a fella in Harrisburg it is FEASER machine shop number 717 236-9387 he rebuilt a 1970 707  gasoline engine for me did a fantastic job on it give them a call

Did you find one yet

Thanks buddy 

Hi Calvin Little in Harrisburg pa 7175668973   Or John Chalmers chambersburg pa 7173348709 might have some  what size engine do you have and where are you at?   I have a B 58 405 with the 354 Chrysler hemi 

Thanks Barry 

I registered I think a B model how do I check and see if it’s in the book or look at the registry for how many is in there

Thanks I’ve been looking for and I miss her too and I enjoyed her reports on the truck 

Hello from Smithfield Pennsylvania

Does anybody know what happened to skippy Mack

Thank you for trying to help me I will double check everything again water temperature does not go up ,its exhaust temperature with the pyrometer goes up extremely fast when it starts to lug down, went up a heat range hotter on the spark plugs haven’t been running it much yet to see if that helps I appreciate the thought have a good day my friend will post when I find a problem

Hi are you still looking for overdrive magazines

Hi  not so far, I also have a 49 Chevy 4400 series 235 six cylinder and it takes exactly the same rotor cap and button as my Mack ,also the per Tronics was the same as I put in my Chevy . everything else is just Standard  turn signal relays. I changed it over to negative ground from positive and  only had to reverse the wires on the temperature gauge and it still works today , went to a one wire alternator and did away with everything else on the old charging system in 04 and haven’t had a problem with electrical at all .

• Hi  I thank everybody for the answers .the timing is part of the problem the first time the engine blew I did   Have the timing advance too much the book and I have the original book calls for 2° and that’s what it set for with regular fuel I have a pyrometer on it now to keep an eye on the internal temperature of it but it’s still getting too hot I’ve triple check the Intake for vacuum leaks nothing there in process of drilling out the jets on the carburetor but it’s slow going and with winter I don’t get a chance to run it that much thanks everybody for all the suggestions will keep you informed merry Christmas

Thanks 

I’m using regular 88 fuel with the 10% ethanol in it it’s about all I can find around here the water temperature doesn’t go up it’s exhaust temperature melts the pistons

Yes  I believe you are right on both of them call for 3 to 4 pound pressure on the fuel put a pyrometer on it a few inches past the exhaust manifold and watch your temperature it will go to 1500 degrees real quick

Hello I have a 7707 c that exhaust temperature melts the Pistons rebuilt the motor 40 over new pistons rings and it’s still running hot put a pyrometer on it ,tried drilling out the jets in the carburetor it’s still running way too hot ,unless I pull the choke out better than halfway to keep it temperature down any advice is this common with them or should I put a four barrel Holly or anything else on it. It is the original carburetor yet

A man in Harrisburg PA by the name of Calvin Little has about 15 707 Engines not sure whether he has any A’s but he does have B’s and C’s and his number is 717-566-8973 hope he can help you he has helped me on my 70 Mack firetruck

Chicago Tire 

Yes mowerman  a 70R 608 fire truck I removed the pump and bed had a 14 ft dump on. It took it off and am building a pickup style bed on it now. Will get some pictures of it on here soon thanks 

Thanks everyone for posting your thoughts about this,I will let everyone know when I get it back in 👍👍🙏

Thanks guys for the thoughts on it I’m leaning towards the carburetor was too lean that it in , plus I might’ve had the timing off too much. OK appreciate input I’m going to try it one more time and see what happens thanks a lot I’ll let you know ,hopefully get it back running in the next two weeks

I will reply to everyone who answered thanks again