Originally Posted by
Shotgun1
Mercury 2002, 115 ELPT 4S, Serial# OT552866, Max RPM 5600 to 5800, best I can tell by gauge idles around 650 to 700 RPM, fuel injected 4 stroke
260 hours on motor, sent injectors to European Marine for service Dec. 2014 and have put on about 100 hours (around 20 hours annually) after injector cleaning, new spark plugs, thermostat, in-line Racor 120-10 micron filter replaced annually, factory under the cowling filter cleaned annually. Have never found any debris or water in filters. Do run Mercury Quickare with all gas and at times have used SeaFoam. I've read several things in regard to primer bulbs on this motor, i.e., yes/no. Don't know if this would matter but the fuel line has been replaced and does have a primer bulb same as original set up.
Issue: starts right up and idles fine, will troll at idle fine, runs through RPMs without a miss clear up to WOT. When trailering boat and back off throttle into neutral as starting on to trailer motor stalls/dies. Will start right back up instantly. Put into gear and give it a little throttle and back off again into neutral dies. Creates quite the challenge when trailing in the wind. If you back off throttle slowly like coming off of WOT it doesn't appear to have near the problem. Any thoughts appreciated. Thanks