I recently acquired an engine with the markings "Magnum 45 PRO'. Cannot seem to find out anything on this engine. Got ant ideas?
Thanks

Long out of production. Here's one thread on it
http://globalservices.globalhobby.co...c5f143ea0cc108

The .45 was a clone of the OS .45 FSR. I think most parts interchange between the two. The Magnum .46 Piston/liner set will fit in the present OS .46 FX also. Probably one reason Magnums are cheaper, less money spent on R+D. They are slightly heavier than the new OS/Magnums, but many people think the FSR's were the best OS engines ever as they had no liner peeling issues. I've had a couple Magnums and they perfect runners. If it's in good shape- run it! Ross

Thanks for the help

anybody know what muffler to put on that engine???? I was given one by a friend w/o muffler, and I am wondering about the muffler.....Seems to be 28.2 mm between muffler mounting bolts, and bolt-on not bolt-through.....any ideas?

Contact Macs Mufflers in California. Maybe they will have something.
— Mailing Address —
Macs (MAC)
7935-A CARLTON ROAD
SACRAMENTO, CA 95826
— Additional Contact Information —
PHONE: 916-456-6932

http://www.macspro.com/