03islandia
New Member
I am new to the forum. It was great to find this Mercury forum.
I have an engine problem or problems with my 2003 Islandia 240 EFI. I haven't had the boat long, I was cruising along at 2/3s throttle when forward motion was reduced as if I had throttled back, I hadn't, and the engine was running rough. The boat idled ok so I was able to make it out of the water.
When I got home, I checked the spark on all six coils with a spark bulb tester, all showed intermittent random spark above idle except for #4 coil which was dead. I replaced coil, now all 6 coils have intermittent random spark. The 20 amp coil fuse has also blown twice so far while testing coils. I have been using the 2002 Mercury 240 EFI service manual to do ohm testing. The sensors that one tests using ohm's are ok. Not sure how to test the other ones ie TPS, knock sensor and so on.
Any thoughts?
I am a shade tree mechanic, and would rather figure it out myself before spending money on labor.
Steve
I have an engine problem or problems with my 2003 Islandia 240 EFI. I haven't had the boat long, I was cruising along at 2/3s throttle when forward motion was reduced as if I had throttled back, I hadn't, and the engine was running rough. The boat idled ok so I was able to make it out of the water.
When I got home, I checked the spark on all six coils with a spark bulb tester, all showed intermittent random spark above idle except for #4 coil which was dead. I replaced coil, now all 6 coils have intermittent random spark. The 20 amp coil fuse has also blown twice so far while testing coils. I have been using the 2002 Mercury 240 EFI service manual to do ohm testing. The sensors that one tests using ohm's are ok. Not sure how to test the other ones ie TPS, knock sensor and so on.
Any thoughts?
I am a shade tree mechanic, and would rather figure it out myself before spending money on labor.
Steve