Shifting Problem

Hi Randy,

My question concerns the Rex marine shifter in my 1990 Hydrostream HST. I have a 1997 Merc 2.5 Promax which was actually rebuilt by you (GPI) in 2001 for the previous owner of this boat. Has Sportmaster case (new in 2002).

The problem I have is in shifting in reverse and then starting motor in reverse gear. Sometimes motor will start and engage in reverse right away, sometimes it takes a minute or so to engage reverse gear for some reason. I have forward gear all of the time. When I had motor winterized last week, I mentioned this same shifting problem to my mechanic. He tried adjusting shift cable and either ended up with full forward, no reverse or full
reverse and no forward. Seems as though there is no in between setting so you would have both forward and reverse all the time. I always start motor in gear so as to minimize wear on clutch dog and gears. Do you think my problem lies with shift cable being stretched and needs replacing or is it something else causing this? How long to replace shift cable if it needs this? Are they expensive? Thanks for any help you can offer.



The problem is not the shifter or the cable, but there are two ways to remedy it. The first is to make the control arm longer. This will have more throw and give you the effect you need. Or you can move the shift arm to the rear hole on the shift rod. This is the rod under the intake manifold going to the Gearcase. Call me if this does not make sense.




Please submit whatever questions you have to  All questions and answers selected will be displayed on this page as they come in.  Note: though all boaters are welcome, priority may be given to I.H.R. members.  Randy can not be held responsible for any advice given.  Though his information and expertise is second to none, he has no control over what you do with your boat.  It is up to you to boat safely and act responsibly, and his advice is only to be used as a guidance for your high performance boat/motor of which you are the one responsible for the risks involved.

Mark C.


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