Shifting Trouble for a Mariner Outboard

Written by rachel costello
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Shifting Trouble for a Mariner Outboard
Outboard motors affix to the stern of a boat. (Jupiterimages/ Images)

Outboard motors are internal-combustion engines that are mounted to the back of smaller-sized boats. The gears of outboard motors can be shifted manually or automatically. Mariner outboards range in size and horsepower. Users often encounter problems when shifting gears.

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Stuck Throttle

The throttle shifts the Mariner outboard engine from one gear to another. The throttle can be become difficult for the user to shift. This causes the motor, and subsequently the boat, to stay in one gear. The throttle cables or shifting-motor control might need to be replaced.


One of the most common shifting problems is the inability to shift the outboard motor into reverse. The shift mechanism on the side of the powerhead might not be properly working. Take the cover off the motor and observe the shift mechanism.


The Mariner outboard motor frequently stalls out and shuts off. This occurs because the motor cannot properly shift gears. The root of the problem might be worn throttle cables.

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