ORIGINAL: jimmyjames213
if you arnt in a hurry i have had great luck with my gms engines (.47 .32 and the th .46). the .32 i have is very reliable and powerful. not to menton cheap. sometimes th will get the engines in earlier than expected, sometimes later. if you are just starting your build i would wait a little while and see if anything new comes out or the engines go on sale.
And they have sporadic carburetor problems and I would never use one on a multi. I would call that "cheaping out" at the risk of reliability. Not to insult the engines (or you
!), but this is known and I've been helping someone with one recently. Some have problems flowing enough fuel at WOT, others have leaks. Some have both (bonus). The rest of the engine seems great, runs like a bear. Pop a Perry carb on a pair and then I'd think about it.
With multis go with well-known engines with consistent properties. If you're trying to save money, build a single. Within reason of course, but I just mean you can't tolerate certain things with multis and should not force yourself to by gambling on engines.
MJD