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Hello,
I have a Mercury 90 hp 4 stroke (2012) and have had an issue with it since I bought it used a few years ago. I am at the stage where I am going to start randomly replacing parts until it goes away.
Here is what happens:
I have the big tiller handle and full power steering. Every once in a blue moon (2-3 times a season) I will be driving it (1/2 to full throttle) and it will make an audible beep for a second, cut the motor for a millisecond then just keep going like nothing happened. It is enough to lurch you forward almost out of your seat then it just keeps going. What I have noticed that if it is calm and not rough, it doesn't do it. It only seems to do it when it is rough out.
So,
1) I have taken it to a mercury dealer twice and when they hook up their scanner, no code comes up.
2) fluids are where they should be and I always use sea foam and premium fuel in the boat so I don't think it is a fuel problem
3) I checked the battery connections and they are solid. I replaced the starting battery with a optima blue top and the problem still persists.
Right now I am at the stage that I think that it is something in the big tiller handle-electrical. The person that owned the boat before opted out on the LED light and so there is an opening there that water and dust can get into. I am questioning if there isn't a short or bad connection in the ignition switch and when it is rough, it causes the bad connection.
What do you guys think? I would take it to the mercury dealer but since so codes show up and it does it so randomly that they would just be guessing at what is wrong. I think I can handle taking the big tiller handle apart and replacing the ignition assembly and checking for corrosion as well. I will be putting in the LED light at that time to close the handle off.
thanks in advance
Sean
I have a Mercury 90 hp 4 stroke (2012) and have had an issue with it since I bought it used a few years ago. I am at the stage where I am going to start randomly replacing parts until it goes away.
Here is what happens:
I have the big tiller handle and full power steering. Every once in a blue moon (2-3 times a season) I will be driving it (1/2 to full throttle) and it will make an audible beep for a second, cut the motor for a millisecond then just keep going like nothing happened. It is enough to lurch you forward almost out of your seat then it just keeps going. What I have noticed that if it is calm and not rough, it doesn't do it. It only seems to do it when it is rough out.
So,
1) I have taken it to a mercury dealer twice and when they hook up their scanner, no code comes up.
2) fluids are where they should be and I always use sea foam and premium fuel in the boat so I don't think it is a fuel problem
3) I checked the battery connections and they are solid. I replaced the starting battery with a optima blue top and the problem still persists.
Right now I am at the stage that I think that it is something in the big tiller handle-electrical. The person that owned the boat before opted out on the LED light and so there is an opening there that water and dust can get into. I am questioning if there isn't a short or bad connection in the ignition switch and when it is rough, it causes the bad connection.
What do you guys think? I would take it to the mercury dealer but since so codes show up and it does it so randomly that they would just be guessing at what is wrong. I think I can handle taking the big tiller handle apart and replacing the ignition assembly and checking for corrosion as well. I will be putting in the LED light at that time to close the handle off.
thanks in advance
Sean
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