Repairs & Maintenance

Subject
Topic: mercruiser shift interrupt switch
FormPC
Forum Member
Forum Member
Joined: 28 January 2009
Location: Long Island NY
Posts: 15
Posted: 26 June 2010 at 8:08am | IP Logged
 After many hours of troubleshooting a no spark issue that cause me to be towed in, I finally found out about the shift interrupt switch on the older Alpha drives.  I have a 1987 Formula PC with 454 Mag and MR Drive.
I disconnected the green/white wires from the switch and the motor started.  My question is, will I be able to use the boat/shift gears while I order a switch.
I have heard you cant get back to neutral with out turning off the key.  Thanks in advance for any info.
Mike M2
BoatUS Member
BoatUS Member
Joined: 31 December 2001
Location: Not where i want to be...
Posts: 4562
Posted: 26 June 2010 at 8:43am | IP Logged
This is usually true. The switch kills the motor for a split second while shifting into neutral to allow the two gears to separate. I remember having a few old boats myself when i was young that the switch didn't work on at all. Never stopped me from going out, but ya gotta remember about it to stop...
Mike M2
Rinker 300FV
"My Other Playmate 2"
Kawasaki STX15F(my 65mph dinghy)
"Sailing the Seas of Cheese"


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