David Martin
Jet Boat Junkie
- Messages
- 548
- Reaction score
- 354
- Points
- 137
- Location
- Punta Gorda
- Boat Make
- Yamaha
- Year
- 2013
- Boat Model
- SX
- Boat Length
- 24
Has the cam position sensor been check..........also an easy swap from one engine to another. This sensor gives the EMC the info it needs for ignition firing and fuel injector timing ect. Symptoms of a bad cam sensor are rough idle and stalling. As for the knocking noise if she is out of timing on the firing far enough the timing chain tensioner can make one hell of a knock noise. Been their done that.