2005 BRP Johnson 90hp carb'd two stroke Model# J90GLSOB.
When running the motor and engaging the fast idle lever, the RPMs will initially increase to about 2800 RPMs. After a few seconds the tach starts jumping around, basically skipping/cutting out and in significantly. If I bring it back down to idle (disengage the fast idle lever) it idles normally.
Motor is sometimes harder to start than usual. I've also lost top end - consistently won't go above 4800-4900 RPMs and normally tops out around 5700 RPMs.
Motor sometimes bogs and quickly stalls out when I give it throttle above idle speed in gear, sometimes it jumps right up.
Thinking rev limiter/power pack may be going. I know of the CDI-based troubleshooting and testing guide just have not attempted it yet as I have not had the chance to pull the boat and I need to get a DVA adaptor.
Main question is the first part above with the fast idle engaged and the tach jumping all around, motor missing hard, etc. - symptomatic of what possibly?
I appreciate any feedback. Trying to get through the rest of our short season up here in the NE.
Dave
When running the motor and engaging the fast idle lever, the RPMs will initially increase to about 2800 RPMs. After a few seconds the tach starts jumping around, basically skipping/cutting out and in significantly. If I bring it back down to idle (disengage the fast idle lever) it idles normally.
Motor is sometimes harder to start than usual. I've also lost top end - consistently won't go above 4800-4900 RPMs and normally tops out around 5700 RPMs.
Motor sometimes bogs and quickly stalls out when I give it throttle above idle speed in gear, sometimes it jumps right up.
Thinking rev limiter/power pack may be going. I know of the CDI-based troubleshooting and testing guide just have not attempted it yet as I have not had the chance to pull the boat and I need to get a DVA adaptor.
Main question is the first part above with the fast idle engaged and the tach jumping all around, motor missing hard, etc. - symptomatic of what possibly?
I appreciate any feedback. Trying to get through the rest of our short season up here in the NE.
Dave