2013 Honda 9.9 four Stroke wont stay running sometimes.

honda99I have a 2018 Honda 9.9 looking at flush kits that attach to the port under the cowling I’m a little confused can motor be started with hose kit or do you just flush with hose without startingThe BF9.9 is your go-to for transportability, fuel efficiency, and augmented battery charging capacity. It delivers additional power. Its 25-inch shaft and tiller steering make operation simple. Features a lower noise level. Compact and reliable