Re: 9.9/15 steering adapter
Adaptor kit PN395245, can be gotten through any J/Rude dealership. Bout' $40.
Or you can go for the steering tube kit PN174212. Gives you the tube and bolt on steering link to the steering cable. You wouldn't need kit 395245.
Or....if you have a steering tube already, just get the steering link. PN433845. Runs around $52.
Look on the BRP site under O/B Accessories for your year engine and then Steering.