Shift interupt switch on J150VXSIG

Madfisherman

Cadet
Joined
Jan 19, 2010
Messages
8
Hi all, first time poster. I've been having a few problems regarding the above switch, it's been sticking in the closed position & thus cutting out 3 of the cylinders, which can be a real pain if I happen to be in a tricky spot. I've disconnected it at the top by the rectifier & so I have all clyinders working again.
I have a couple of questions,
1) can I safely leave this switch disconnected? It starts fine & goes into warm up mode then cuts back to 6 - 700 rpm, still a bit of a clunk going into gear though
2) what / how is the switch activated? I've looked & can see what should happen to make the switch operate, but I can't ever see it working (someone else operating the gear lever for me while I watch the switch & observe the circut meter) & the meter I put on to show it working does not move unless I operate the switch myself. I don't mind buying a new switch assembly but can't see the point if it's not even doing anything or being activated in the first place.
Also, I've looked at parts schematics & it shows this switch & holder 'upside down' compared to how mine is positioned. Mine has the wires at the top & the actual switch 'button' at the bottom, the schematics show it the other way around.

Thanks guys, I look forward to your responses.
 

ezeke

Supreme Mariner
Joined
Sep 19, 2003
Messages
12,532
Re: Shift interupt switch on J150VXSIG

When it works correctly the switch should engage only as you shift out of forward gear.

Yes, you can disable the switch - the easiest way is to disconnect the ground wire at the switch.

Be careful, having the switch disabled can sometimes make it hard to get out of forward gear when you need to - as when approaching a dock.
 

Madfisherman

Cadet
Joined
Jan 19, 2010
Messages
8
Re: Shift interupt switch on J150VXSIG

Thanks for the reply,

Yes I'd noticed that it can be a bit stiff to get back into neutral if the revs are still a bit high, I just wait a few seconds until it back to normal idle & it shifts fine.
So, it only operates going from forward to neutral, that's handy info.

:)
 

interd0g

Seaman
Joined
Dec 16, 2008
Messages
60
Re: Shift interupt switch on J150VXSIG

I am sure mine isn't working also. I had the lower pans off to get a good look and it seems the switch toggle never touches anything at any time.
Is there any adjustment and test procedure?
 

Dhadley

Supreme Mariner
Joined
Feb 4, 2001
Messages
16,978
Re: Shift interupt switch on J150VXSIG

Actually if the motor runs correctly and idles low enough you don't need it. If the motor idles too high then yes, it will be hard to get out of gear as mentioned. If it's hard to get out of gear you might look into the set up and see if you can get the idle down.
 
Top