Perkins 4-108M Switch details

pbanderson · #1 (**permalink**) 04-22-2008

I am trying to replace my engine switch and Perkins is less than helpful and don't make a replacement. The wires are a mess and I don't know where they terminate. Does anyone have a wiring/terminal diagram for the 4-108m ignition switch.

dancamp · #2 (**permalink**) 09-01-2008

no, I don't know, but I have the same question. My ignition switch on the same motor on my sailboat has quit working and i need to install a new ignition switch, that comes with no schematic or instructions.

PorFin · #3 (**permalink**) 09-01-2008

Ahh! I see I'm not the only one frustrated by Perkins wiring!

I've found that the engine owner's and workshop manuals are not quite exact in this area, since it's obvious that my instrument panel is generally different than those shown in the diagrams.

Which switch do you have? Is it the four position (Off, Run, Preheat, Start) switch, or a two position (Off, Run) with separate starter and kill buttons?

dancamp · #4 (**permalink**) 12-13-2008

I got the same problem. I just bought a Perkins Ignition Switch 2846129 and it is a Off - Run - Preheat - Start switch. I think the switch itself has five termanals with one or two of them double. I'm not certain as it's on the boat and I'm at home.
I also cannot find a schematic or anyplace else and would like to know where the many different wires go to this switch. I've got a Perkins 4-108 in a boat. Before the old ignition key froze and I had to buy another, it also had an alarm (maybe a low oil pressure alarm) hooked to it. I put a temporary ig. switch in till I could get the original online. In the meantime, I lost all original info that I had written down before removing all the wires.
any help would be great