OK, I just bought this rig with twin 94 Ev. 200s, and here is where I am at. Sea trialed the boat, ran fine, had mech. check compression and lower units, all fine, but did fine flywheel magnets starting to get loose, installed OMC Kit, fixed. Boat sat for 2 weeks, crank up and go. Run about 1/2 mile and the port engine shuts down to about 1500 rpms, sometimes it comes back up sometimes it does not. Seperate fuel tanks for each engine, stb runs fine, same gas/oil in both. Changed fuel filters with no change in motor. It acts like the S.L.O.W. system is kicking in, but I get no warning horn, it is not overheating, and the VRO is disabled. The only thing I did between the sea trial and this problem is fuel up. This engine smells like it is running too rich to me, but not smoaking either. There was no water in the old fuel filter. If I throttle back, it cuts off, then as I give it gas to keep it running, it cuts off again, pumping the primer bulb during this time makes no change either, nor does pushing in the choke. She cranks evey time, just wont run above idle for more than a minute. Any suggestions?
