I am thinking about moving into gassers and have found a Mac 32 ready to bolt on for $65. The person selling states that the weight is 4 lbs & 5 oz and that it turns a 16/6 prop at 8850 rpm's. Is this a decent engine to get started with (I've been into nitro 40 size planes for awhile and am ready to ditch nitro for gas if I can find deals like this)? What would be a good size plane for this engine? A 120 size? A 25%? I would appreciate any information anyone can provide to me about this engine (I already ran a search for this engine and did not find much useful information so I'm asking in here) and recommendations surrounding this engine (planes, props, things to look for, etc). Thanks!!

Mike

These engines are better if you keep them in the 7,000 to 7,500 rpm range. A 18-8 would be ideal. They will also do better with a 7/16" or 1/2" carb. The stock carb is a 3/8". The origiinal magneto ig nition is OK but I run C-H ignitions on mine.

A 120 size plane is correct but you must pick one a little heavier with a bigger front end.

Enjoy

Jim

Jim,

Thanks for the info. What plane do you use your Mac on? Any suggestions for planes? I was thinking about the AKM Freedom 3D...Thanks again for the info!

Mike

I ran this engine (w C-H ignition) two seasons ago on an 80" w/s ISC clipped wing Cub. The previous post is correct in that an 18 x 8 is the better prop for this engine. The engine was a good combo w/ the Cub and an overall good performer. However, I did think that comparatively it was a little heavy -- you've got to match the engine to your application. Best of luck!

A good all around plane for the mac is a roadrunner with a
18-8 with C&H ing. And they will do it all.