ORIGINAL: harlanb
ok, Thanks for the advice.
I am going to go with the 40 fx that I already have.
I will just keep in mind that I may want to use a larger engine when I build the engine compartment.
Thanks agian.
Your engine will do fine why spend more money.
If a .46FX comes your way, it will drop right in.
Also the Tower .46 muffler, about $16, will fit and give 500-700 RPM more.
Never had any of the AX series so I cannot comment on the mounting hole pattern.