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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!
 
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