Switched from a 2 stroke to 4 stroke Yamaha, do I need different fuel lines and I do l need the primer bulb?

Question

Runs great at slow speed but when I try to go fatser it seems to be fuel starved?

Answer 1

No you do not need different fuel lines, but you do need to make sure they are in good shape and not dry-rotted or cracked.  Yes, you still need the primer bulb.

Hopefully you cleaned out any mixed fuel from your tank (if you did not have an oil-injected 2-stroke). Running mix through  your 4-stroke won't necessarily hurt it, but it will smoke really bad and will probably foul the plugs pretty fast... which could cause it to run poorly.

Answer 2

If your fuel was oil mix in the tank did you drain it?? Fuel filter changed? Vent on tank pluged?

wrong prop?