1989 135 black max probs

[ugadawg187]

I had my boat on the lake the other weekend and was going across the lake when it started idling down. I put it in nuetral and it was fine. Started back across the lake and it did it again. I had someone look at it and they told me my switch boxes were bad. That it was only runnin on 4 cylinders. If i replace those will it fix the prob?

 

[WillyBWright]

Re: 1989 135 black max probs

Don't bet over four hundred bucks on it. Two switchboxes aren't likely to fail at about the same time. Which two cylinders are out?

 

[ugadawg187]

Re: 1989 135 black max probs

I have no clue which 2 cylinders were out. The mercury tech said he tested the stator and trigger and there good. Just that a had a bad switch box and it needed to be replaced. I juss wanna know if the bad switch box could have been causing the power loss probs?

 

[WillyBWright]

Re: 1989 135 black max probs

Certainly. There are two. I would find it far more likely for one to be bad than two if these symptoms came on suddenly. Each costs over $200. Each fires three cylinders directly and the other three indirectly. Current has to pass through both to make spark.