Service Manual 250-300 HP 3.4 L E-TEC Gearcase [Shift Rod Adjustment]

The shift interrupt switch is in contact with the shift lever (positioned at the base of the powerhead). The switch is normally open and activates momentarily as the shift linkage moves.

Excessive shift loads activate the switch. Typically the switch is depressed when the linkage moves from the FORWARD or REVERSE position into the NEUTRAL position.

A depressed switch completes a ground circuit connected to the EMM. The EMM then shuts off fuel and spark to three cylinders for approximately one second to reduce drivetrain loads and ease shifting, then immediately restores normal engine operation.

The shift interrupt switch must be released to its normal open position before the interrupt function can be activated again. This circuit is not functional above 2500 RPM.

1. Switch, shift interrupt

Gearcase Removal

To prevent accidental starting while servicing, twist and remove all spark plug leads. During service, the outboard may drop unexpectedly. Avoid personal injury; always support the outboard’s weight with a suitable hoist or the tilt support bracket during service.

Remove pin and washer from shift rod lever to release the lower shift rod.

1. Shift rod screw

Note where the index mark on the gearcase aligns with the index number of the adjustable trim tab so the trim tab can be installed in the same position. Remove the trim tab retaining screw, gasket and trim tab from the gearcase.

1. Index mark
2. Trim tab retaining screw