Mcculloch 35A help. Any Mac experts?

[thefarmboy21]

Finally got it running. Sounds gnarly! But when I hold it full throttle it seems like it's surging. Just like it's full throttle and burbling and then someone is turning the kill switch on and off. I really don't know how it should be tuned. I'm hoping that's all it needs, but I don't know what exactly needs done. The carb is absolutely odd how it works.

 

[Doug Caswell]

Wondering if anyone has carb tuning for 33a,should be the same as 35a.Downloaded the 3 pages but its too small to read,tried to enlarge but it gets fuzzy as is my vision.A pdf or scan works.Thanks

 

[Doug Caswell]

Doesnt seem to be pumping,I renewed all parts in carb and pump diaphrams.Stays runnin as long as i keep hittin the primer.Runs for about 10 sec after priming.Is it possible to pm on this site?Thanks

 

[Doug Caswell]

Doesnt seem to be pumping,I renewed all parts in carb and pump diaphrams.Stays runnin as long as i keep hittin the primer.Runs for about 10 sec after priming.Is it possible to pm on this site?Thanks

 

[Doug Caswell]

Thanks to Ray Benson for sending me some info on mac33a in which i found out that i have a 33b or super 33 or a 39 as there wasnt any nomenclature on engine other than serial number.Found out i need a gasket between carb body and carb cover which i kinda figged but wasnt sure.Not sure at this point if this will cure problem.Also found out that carb needle starting point is 3 turns not 1.5 turns as in most engines.And being a new member i figged out how to pm or start a conversation.If people think this saw is pig rich in oil i have a homelite thats 10:1 on mixture!Highest mix ive ever seen as most are 16:1 or lower.

 

[Doug Caswell]

Thanks to Ray Benson for sending me some info on mac33a in which i found out that i have a 33b or super 33 or a 39 as there wasnt any nomenclature on engine other than serial number.Found out i need a gasket between carb body and carb cover which i kinda figged but wasnt sure.Not sure at this point if this will cure problem.Also found out that carb needle starting point is 3 turns not 1.5 turns as in most engines.And being a new member i figged out how to pm or start a conversation.If people think this saw is pig rich in oil i have a homelite thats 10:1 on mixture!Highest mix ive ever seen as most are 16:1 or lower.

 

[Doug Caswell]

Wondering if anyone has part number for carb cover for 33b as theres a diff between some of the models.I have part numbers for 33 but not for 33b.I'll include a pic of what i need.I can make a gasket but its time consuming.The bottom pic is what i need.Top pic just shows the diff.Talked to a guy that has microfice but hes showing gaskets are the same.Ok for some reason pics got mixed up .I need #12 not #14 in pics

 

[Doug Caswell]

View attachment 757729
Wondering if anyone has part number for carb cover for 33b as theres a diff between some of the models.I have part numbers for 33 but not for 33b.I'll include a pic of what i need.I can make a gasket but its time consuming.The bottom pic is what i need.Top pic just shows the diff.Talked to a guy that has microfice but hes showing gaskets are the same.Ok for some reason pics got mixed up .I need #12 not #14 in pics

 

[Doug Caswell]

Well decided to make my own gasket.Yeah ive done the hammer tap deal but alumn is pretty soft so i decided to try a diff method.I painted gasket surface and while still wet made impression on gasket material,worked great!