I am thinking of buying a 3W engine. This will be my first gas engine. Is it better to buy a rear induction engine or one with the side carb? What are the pro and con? If you have a rear induction engine will you have to cut the firewall. Do I have to buy a special mount?
It seems that a side mount carb would be easier to install and adjust eventhough you have to cut the cowl. Any advise please.

Hello Harigo
This is my experience with side and rear induction engines. I've used both the 3W 75I and the 3W 75us. The side carb (3W75us) had quite a bit of tuning issues due to the varying air pressure in the cowl. It was quite a hassle to get it to run, in all attitudes, to suit me. On the other hand the 75i had it's carb partially inside the fuse and proved to be a superior performing engine, due mostly to the constant air pressue in the fuse, only requiring a small needle adjustments. The rear carb engines are a little more trouble to mount, cutting hole in firewall and standoffs. The standoffs, I cut from 1" dowl. A rear induction engine will be my choice everytime where availabile.
Ralph