my uncle gave me this motor, its a .46, and on the side it says asp or psa or aps something like that, what the real name? any good?

Perhaps it's ASP? Made at the same plant as Magnum, SC, and a couple other brands. Should be ok.

is it bigger than an mds .40?

If you are asking about physical size, I don't know. If you're asking about displacement, yes, a .46 is larger than a .40. These numbers represent the engine's displacement in cubic inches. Note that displacement is only loosely related to power. While in general, engines with a larger displacement will have more power, there are many different levels of engines. It's not hard to find a .46 engine that has more power than a larger .61 engine. However, the .46 will most likely cost more money.

alrighty thanks, anything else.

Welcome. Was there another question?

ASP has been making engines for a number of years. The original ones wern't very reliable but I have to give them credit, they do keep trying improved versions. The latest version is called "Super Series". I have a 52 size and its a little touchy to adjust but turns the prop scary fast once its set.

sounds cool. i hope it will do good for me. anyone no the specs for a .46 non s