• Welcome to Jetboaters.net!

    We are delighted you have found your way to the best Jet Boaters Forum on the internet! Please consider Signing Up so that you can enjoy all the features and offers on the forum. We have members with boats from all the major manufacturers including Yamaha, Seadoo, Scarab and Chaparral. We don't email you SPAM, and the site is totally non-commercial. So what's to lose? IT IS FREE!

    Membership allows you to ask questions (no matter how mundane), meet up with other jet boaters, see full images (not just thumbnails), browse the member map and qualifies you for members only discounts offered by vendors who run specials for our members only! (It also gets rid of this banner!)

    free hit counter

Running rough and weak

jetleppard

Member
Messages
1
Reaction score
0
Points
10
Boat Make
Yamaha
Year
2020
Boat Model
SX
Boat Length
19
I have a 2020 sx 195 with less than 40 hours total and less than 5 hours this season. When I start it up, it idles nice for 5-10 seconds before idling rough. Sometimes it'll die completely but not always. Runs just a bit better with more throttle but seems very underpowered and rough. Can't get anywhere near full speed. I only run 91 octane non-oxy. Speedo under-reports (about half of what I'd guess I'm actually doing). No check engine light. I'm in MN and only a few weeks left of the season. Local shops are about 3 weeks out. Any ideas? Thanks!
 
Sounds like a bad spark plug. When did you last change them?
 
or bad fuel '' STALE!
 
Back
Top