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  1. M

    Shift interrupt switch

    There was no switch when I bought the boat. I was having trouble shifting and started digging for a solution. That when I found the info about the switch. Just went online with motor specs and ordered one. Not much of a wiring guy so i put switch inline with coil. just yesterday with the...
  2. M

    Alpha 1 hard as heck to shift.

    Once you figure out the outdrive check to see if there is a shift interrupt switch on cable shifting assembly. I bought used boat and it also was very hard to shift like you described. Started digging to see why and discovered that Mercruiser 3.0l have this issue. The shift interrupt switch...
  3. M

    Shift interrupt switch

    I got a crash course on wiring diagrams and found the wires that at some point would have been connected to the switch. White wire with green stripe to distributor. Purple wire going to coil. Boat starts and shifts. Still have to adjust the cables a bit but much closer than I was. The...
  4. M

    Shift interrupt switch

    I am still trying to understand how this works but I got the new switch today and it is the same as the one I already have. I did rewire into the correct wire, green/white wire, going to distibutor and the motor will start. Now its just getting it where it goes and adjusted correctly. I'll...
  5. M

    Shift interrupt switch

    I have a new switch coming tomorrow so news at eleven.
  6. M

    Shift interrupt switch

    I am going to have to study this. Some how I must be missing some detail. For the switch I have to be installed like manual says where it says the boat will never start. Love to be able to talk this thru with you sometime.
  7. M

    Shift interrupt switch

    I just tested this. With the interrupt switch wired in but not installed i tried to start motor and motor would not start. Pressed plunger in on switch and motor will start. My understanding of these switches is NO = no 12v, NC = 12v. ???
  8. M

    Shift interrupt switch

    Another correction. The plunger would be in the V of the activating lever assmebly. If set according to the manual, the plunger on switch would be open so I get no current to coil. If it was normally closed I think it would work.
  9. M

    Shift interrupt switch

    Wrong serial number. Its OWO50471
  10. M

    Shift interrupt switch

    Serial number is B915133. Alpha outdrive. Boat is a 2005. I hadn't thought about the motor possibly being changed out But the previous owner has done some modifications. The wiring has had some work so when I added the shift interrupt switch I put in the wiring going to the coil. Wiring is...
  11. M

    Shift interrupt switch

    I have a boat with mercruiser 3.0 liter motor. Bought boat used. When I got it there was no shift interrupt switch on the shifting assembly. It looks as if there are two places it could be installed. I purchased the plunger type switch that checks out to be normally open type and it seems to...
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