Franknstein
Member
Hi all
I recently recommissioned my Maxum 2300SC from winterisation, and all went well, except the starter motor which died a death during the cold season, so replaced that - all was well, engine started first time.
Upon running the engine though, after it had warmed up, I noticed it was idling very lumpy, to a point it was wanting to cut-out, revs dropping very low, up and down perhaps once every second - continually.
Other than this it runs perfect throughout the rev range. I took her out on her maiden voyage for the season this sunday, and it performed faultlessly throughout the rev-range... When I came back to the mariner to tie-up - it kept cutting out on me, which was infuriating and stressful, as getting her into her berth is difficult enough with power.
Anyhow, I suspect a dirty carb - the idle circuit perhaps? I never did any preventative maintenance on the fuel system at the end of winter, and probably am suffering the consequence now. I have however replaced the water/fuel sep filter.
I was hoping to spray some carb cleaner somewhere into the carb to clean it out, and hopefully not have to remove the carb from the inlet manifold.... is this possible to get carb cleaner into the idle circuit in-situ? Any tips on doing this? Engine running or not? Would I have to remove the idle adjustment screw perhaps completely and spray in there or something? Its an Edelbrock carb, not sure on the model number - but yeah, the normal big dumb edelbrock carb from those early 90s 5.7L GM/Merc motors.
Any help appreciated.
Many thanks
I recently recommissioned my Maxum 2300SC from winterisation, and all went well, except the starter motor which died a death during the cold season, so replaced that - all was well, engine started first time.
Upon running the engine though, after it had warmed up, I noticed it was idling very lumpy, to a point it was wanting to cut-out, revs dropping very low, up and down perhaps once every second - continually.
Other than this it runs perfect throughout the rev range. I took her out on her maiden voyage for the season this sunday, and it performed faultlessly throughout the rev-range... When I came back to the mariner to tie-up - it kept cutting out on me, which was infuriating and stressful, as getting her into her berth is difficult enough with power.
Anyhow, I suspect a dirty carb - the idle circuit perhaps? I never did any preventative maintenance on the fuel system at the end of winter, and probably am suffering the consequence now. I have however replaced the water/fuel sep filter.
I was hoping to spray some carb cleaner somewhere into the carb to clean it out, and hopefully not have to remove the carb from the inlet manifold.... is this possible to get carb cleaner into the idle circuit in-situ? Any tips on doing this? Engine running or not? Would I have to remove the idle adjustment screw perhaps completely and spray in there or something? Its an Edelbrock carb, not sure on the model number - but yeah, the normal big dumb edelbrock carb from those early 90s 5.7L GM/Merc motors.
Any help appreciated.
Many thanks