Well I'm just putting this post up in the hope some one might have a few tips for me? Recently I've been trying to get some run time on my new .90 CMB motor in my new rigger. Boat is set up as the builder recomended and I think I have it all pretty sweet but, I've had it out to pond about 4 times now with average to poor success so far . Any way this is the set up and basicly I've been having problems lauching the boat and successfully getting it up on the pipe. Seem to be very fine point between too rich and too lean. It's a 3 month old CMB.90 (from brand new), using 40 percent fuel, tried a std 1667 and a std h50,head clearance is at 15thou, pipe length at 305mm, mc9 plug, and getting frustrated . Any one got any ideas for me ? Please? Note: had some help from a few more experienced club members than myself, comments have ranged from engine still too tight to I will have trouble setting the needle till its more run in. I've also been assured that it should run a std 1667 but I'm not that sure???? Thanks in advance.