thefarmboy21
ArboristSite Operative
Monday I drug out my Grandpas old Mac 35A. I didn't know it even existed really. It's not been ran in close to 40 years I'd say. I can hardly find any info on these style Macs, other than old adds, fuel ratio arguments and I did find the exploded parts view of a model 33. Here is what I need to know:
1. How does that weird "throttle gate lever" that you adjust behind the carb work? I have a parts carb with the lever, but Mine doesn't have it and I really don't want to risk ruining the diaphragm/gasket to take it apart and put one on it, if it's not a necessity. Mine also doesn't have the issue screw or retainer, but the parts carb does....necessity???
2. How do I adjust the carb and do I adjust it by sound like a modern 2-stroke or no?
3. I'm assuming that the diaphram pump in the carb is no longer available, what's the likelihood that mine is bad and also how do I preserve them? I have a spare that appears good from the parts carb, but I don't want it to dry out and ruin either. Can I spray it with trans fluid, 2-stroke oil, PAM spray, or anything to keep it in good condition?
4. I also understand there is some type of diaphram in the tank...how do I check that and are they prone to go bad?
5. Correct or recommended spark plug brand/number?
6. Can anyone tell me or send me a link to the common starter repair? Mine seems to work, but doesn't recoil tight like it should.
7. Anyone know the recommended compression psi? Mine feels good, but haven't started it. Feels like 200 psi and I wanna make sure that's not the starter binding up.
1. How does that weird "throttle gate lever" that you adjust behind the carb work? I have a parts carb with the lever, but Mine doesn't have it and I really don't want to risk ruining the diaphragm/gasket to take it apart and put one on it, if it's not a necessity. Mine also doesn't have the issue screw or retainer, but the parts carb does....necessity???
2. How do I adjust the carb and do I adjust it by sound like a modern 2-stroke or no?
3. I'm assuming that the diaphram pump in the carb is no longer available, what's the likelihood that mine is bad and also how do I preserve them? I have a spare that appears good from the parts carb, but I don't want it to dry out and ruin either. Can I spray it with trans fluid, 2-stroke oil, PAM spray, or anything to keep it in good condition?
4. I also understand there is some type of diaphram in the tank...how do I check that and are they prone to go bad?
5. Correct or recommended spark plug brand/number?
6. Can anyone tell me or send me a link to the common starter repair? Mine seems to work, but doesn't recoil tight like it should.
7. Anyone know the recommended compression psi? Mine feels good, but haven't started it. Feels like 200 psi and I wanna make sure that's not the starter binding up.