Here is a post about hard or soft mounting a gas engine from November, 2002.
Modelers use to soft mount their gas engines years ago but today most don't. I don't know why M.A.N. showed the soft mount Fuji engine but I can guess why. First the Fuji is not the best gas engine for the Patty, it's too heavy at 5.28 lbs., about 2 lbs more than the BME 50, but they (Great Planes) are the distributors for Fuji. The soft mount they show is made by Great Planes -- do I need to say more?
Recently our club sponsored an IMAC competition and had about 40 gas giants from all over the southeast region, ranging in price from $3,000 to $15,000 and not one had a soft mounted gas engine.
Originally posted by rcguy1
In regards to soft mounting the BME 50, I spoke with Keith of BME and he said it is best to hard mount their engine or any gas engine. You guys were right! He said at running RPM (3500 to 4000) the gas engine will vibrate more and tear up the rubber mounts in no time. He gave me a work around for the Du-Bro soft mounts because I had already drilled the firebox to accept this engine mount. Cut the rubber bushing flush with the mount and cut the aluminum bushing to fit. This will change the mount from a soft to a hard mount. (See picture) He recommends using the Hanger 9 hard aluminum engine mounts and they are a lot less expensive. ($10.00 vs $32.00) Thanks for the heads up on that one.
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