trans problem

[WiserTime]

I just launched this past weekend, and I noticed an issue with my port transmission. I was hoping someone might have some insight... :smt100

I have a 87 300 Weekender with twin 350 inboard mercs. The issue I noticed is when I put the port engine in gear, either forward or reverse, the rpm's jump way up. When I put the engine back in neutral, the rpms settle back down to about 700. Not sure what is causing this. :huh:

This is my second season with the boat, and I did not have this problem last season.

Any thoughts?

 

[PlayDate]

I just launched this past weekend, and I noticed an issue with my port transmission. I was hoping someone might have some insight... :smt100

I have a 87 300 Weekender with twin 350 inboard mercs. The issue I noticed is when I put the port engine in gear, either forward or reverse, the rpm's jump way up. When I put the engine back in neutral, the rpms settle back down to about 700. Not sure what is causing this. :huh:

This is my second season with the boat, and I did not have this problem last season.

Any thoughts?

You need to get a qualified mechanic to look at it. Your transmission is electronically independent of the engine. When you select forward or reverse, you engage an internal hydraulic pump which applies pressure to the drive clutches inside the transmission. When the pump is engaged, drag is increased on the engine not decreased.

There are a couple of things you can do to provide more information:

1) Transmission fluid level
2) Transmission fluid color
3) Number of hours on the transmission
4) Make and model type
5) Does the drive actually engage forward and reverse?


-John

 

[WiserTime]

quote]


You need to get a qualified mechanic to look at it. Your transmission is electronically independent of the engine. When you select forward or reverse, you engage an internal hydraulic pump which applies pressure to the drive clutches inside the transmission. When the pump is engaged, drag is increased on the engine not decreased.

There are a couple of things you can do to provide more information:

1) Transmission fluid level
2) Transmission fluid color
3) Number of hours on the transmission
4) Make and model type
5) Does the drive actually engage forward and reverse?


-John[/quote]

Hi, thanks for the reply. The transmissions are velvet drives, which I think are original to the boat. So, that would be about 800 hours of use on them. I checked the fluid, it was a tad low, and I did not pay a whole lot of attention to the color. I will have to check it again and take note. Also, the it does engage in both forward and reverse.

 

[PlayDate]

Please fill it to the mark and listen to the transmission when you shift it and listen for valve noise or a buzzing sound coming from the unit (indicates that air is present). Are there maintenance records that indicated when the transmission fluid was last changed?

-John