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70 HP Mariner wont shift to reverse w...

Discussion Forum at MarineEngine.com » Mercury Mariner Outboard » Archive through July 29, 2009 » 70 HP Mariner wont shift to reverse while in the water « Previous Next »

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george
New member
Username: mainer24

Post Number: 1
Registered: 07-2009
Posted on Wednesday, July 22, 2009 - 08:59 am:   Edit Post Delete Post View Post/Check IP

I put new cables in and they are adjusted correctly. It will go into reverse on land with muffs but not while in the water. If I remove the shift cable while in the water and attempt to slide the shifter back to reverse it will not go. (I verified that the throttle was in the idle position.)
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Benjamin Jones
Advanced Member
Username: benjamin_jones

Post Number: 290
Registered: 04-2008


Posted on Saturday, July 25, 2009 - 03:48 am:   Edit Post Delete Post View Post/Check IP

Hi,

Can you get it into FWD in the water sans cables being attached? It takes a great deal of force to shift it as such and you might not be using enough force?

Is the control box giving you all the movement you need? FWD & REV with cable disconnected at motor end. Are the trunnions secure?
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george
New member
Username: mainer24

Post Number: 2
Registered: 07-2009
Posted on Saturday, July 25, 2009 - 03:52 pm:   Edit Post Delete Post View Post/Check IP

Yes, the control box works good and gives all the movement it is supposed to. I cant even muscle the shifter at the motor into reverse if the boat is in the water. Something that occurs in relation to the pressure produced while in the water will not allow it to be shifted into reverse. I also noticed the other day that it doesn't quite allow itself to shift into neutral sometimes. It will either provide enough resistance that it wont push all the way into neutral or it will go into the neutral position but I can hear something occurring with the gears inside like is half engaged.

To be honest I am an auto mechanic but I am unfamiliar with the trunnions on this motor. Could you elaborate on that so I could perhaps research it a bit?

Thank you for the help.
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Kirk Bawiec
Member
Username: smplsoft

Post Number: 50
Registered: 06-2009
Posted on Saturday, July 25, 2009 - 07:19 pm:   Edit Post Delete Post View Post/Check IP

Just a thought... What is your engines idle speed in neutral? Shifting can be dificult if engine is idling too high. say above 900rpms. Do you need an exploded veiw of your lower unit? If so, I need the serial number.
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george
New member
Username: mainer24

Post Number: 3
Registered: 07-2009
Posted on Sunday, July 26, 2009 - 09:16 pm:   Edit Post Delete Post View Post/Check IP

I figured out the problem It has nothing to do with being submerged. It has to do with the fact that my trailer is about 12 inches longer than the boat. I just discovered that there is a mechanism that is supposed to I presume both lock the unit so it doesn't go into reverse and also not allow it to go into reverse if it isnt latched properly. It is all bent up. I slid my boat back to put the same pressure down onto the latch (which is all bent and not working proprly) and it caused the same effect that I got in the water.

The devise works a bit like a car door latch. could you tell me a bit about how it works inside the motor.
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Ruben F
New member
Username: westexasrepublic

Post Number: 1
Registered: 07-2009
Posted on Monday, July 27, 2009 - 10:59 am:   Edit Post Delete Post View Post/Check IP

YAH, with the motor up you can move that latch with your hand and see the rod that runs to the lower unit, that rod is forced up to lock the motor when in revers. the shift rod turns and attached to that rod is a plastic piece that works like a wedge, when turned wedges the rod up, that engages the hook latch down onto the transom bar.

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