"I've got a pair of 04 115
"I've got a pair of 04 115 4-strokes on the back of a 26 foot Aqua Sport down on Marco Island at the family place. My family is from MN and as my dad passed away 3 years ago the boat doesn't get used as much as it did. I was down for 2 weeks over Christmas and the trip started well with the boat running well for the first couple trips.
The port engine started running poorly and as little as the boat is used I first thought it was fuel related so I changed and cleaned all the filters and the problem remained.
I called the mechanic out and he was certain it was fuel related so he checked the fuel pressure which was ok and proceeded to run a pressurized solution through the injectors and replaced the plugs and told me things were fixed.
When we took the boat out the next morning it did the same thing. It will idle fine and when you floor it, the port engine will only get to about 4000 rpms and then fall back to about 3000 and run rough. We took a shelling trip where I kept both motors at 2300 rpms and both motors purred for about 15 minutes before the port started fouling out. We continued on one engine, and when we returned about 2 hours later the port engine started and idled fine for a while.
I told the mechanic that I thought the problem might be electrical as it acted like a coil heating up and then shorting out, then after it cooled down again it would idle well for a while. The mechanic was convinced it was fuel related, and as we are in a no wake area we didn't take the boat out to test while he was there.
While it was running rough I pulled plug wires and isolated the problem to one cylinder at that time. The mechanic told me he had never encountered an electrical problem with this motor and that was his reasoning for targeting the fuel.
Any experiences/advice would be appreciated.
Thanks - Dan"
"I've got a pair of 04 115 4-strokes on the back of a 26 foot Aqua Sport down on Marco Island at the family place. My family is from MN and as my dad passed away 3 years ago the boat doesn't get used as much as it did. I was down for 2 weeks over Christmas and the trip started well with the boat running well for the first couple trips.
The port engine started running poorly and as little as the boat is used I first thought it was fuel related so I changed and cleaned all the filters and the problem remained.
I called the mechanic out and he was certain it was fuel related so he checked the fuel pressure which was ok and proceeded to run a pressurized solution through the injectors and replaced the plugs and told me things were fixed.
When we took the boat out the next morning it did the same thing. It will idle fine and when you floor it, the port engine will only get to about 4000 rpms and then fall back to about 3000 and run rough. We took a shelling trip where I kept both motors at 2300 rpms and both motors purred for about 15 minutes before the port started fouling out. We continued on one engine, and when we returned about 2 hours later the port engine started and idled fine for a while.
I told the mechanic that I thought the problem might be electrical as it acted like a coil heating up and then shorting out, then after it cooled down again it would idle well for a while. The mechanic was convinced it was fuel related, and as we are in a no wake area we didn't take the boat out to test while he was there.
While it was running rough I pulled plug wires and isolated the problem to one cylinder at that time. The mechanic told me he had never encountered an electrical problem with this motor and that was his reasoning for targeting the fuel.
Any experiences/advice would be appreciated.
Thanks - Dan"
