I just repowered from an 86 yamaha 90 hp 2 stroke to an 87 yamaha 115 hp 2 stroke. I expected the boat to perform well but it is actually slower. I initially thought it might be the prop but I noticed the butterflies don't open all the way at full throttle forward (instead of being at 90 degrees they're at about 65 degrees). The strange thing is the butterflies do open all the way at full reverse throttle.
I did not swap out the Yamaha controls or cables. Any idea what could be going wrong? Everything worked fine on the old motor.
The guy I bought the motor from thought it was probably a Yamaha controls problem but I'm not sure where to start.I am certain that the carbs are perfectly clean though..
Thanks for your help.
I did not swap out the Yamaha controls or cables. Any idea what could be going wrong? Everything worked fine on the old motor.
The guy I bought the motor from thought it was probably a Yamaha controls problem but I'm not sure where to start.I am certain that the carbs are perfectly clean though..
Thanks for your help.