Mac conversion questions
The 28 and 32 Mac weedies look indentical on the outside. I'm on the other side of the nation right now but I'm thinking that there is a 28 or 32 somewhere on the cylinder. I'm thinking its on the edge of the base? I have a 28 that I converted to a 32 with the addition of a 32 cylinder.
They look nice with the C-H ignition. They look like they were supposed to be a model engine all along.
They work better with a larger carb like the one fron a Zenoah G23 Walbro WA167 but I understand that they are no longer available. I bought mine from Carr Precision. They have a 28 molded into the venturi on the air inlet side. That's a 7/16" venturi. I've also used a 32 (1/2") Walbro carb on them.
The newer Homelite and Poulan chain saws make nice conversions too. Though you will be forced to use the C-H ignition with some models. The original carb is big enough on these providing you don't get a new type 4 Poulan with the non adjustable sealed carb. The 33 through 46cc sizes all weigh the same. A source for the Homelite would be Cummings Tool. Lawn Station often has sales and they also play the game on Ebay.
Enjoy,
Jim