Installing kill switch on 1980 Yamaha 25A

[jonathandorey]

Just wondering if anyone can help. I've just bought the above motor - it is a twin cylinder points ignition motor which currently has a toggle switch installed at the front in order to stop the engine (with four wires attached - running from each condenser to each secondary coil).

I'm looking to install a kill switch in case of a MOB situation. I'm fairly certain the boat has points - it is twin cylinder - do I therefore need dual kill switches in order to stop the engine - or do both plugs fire together - and can I therefore wire them together at the kill switch (I'm guessing I can't do this).

Thanks in advance

[Davie]

Use the two wires on the switch that short out when you pull the fork out. Connect them to the double female bullet connections joining the coils .(3" from coil) All your doing is joining the points together and knocking the timing off. The kill switch will not kill the spark on this engine.

[jonathandorey]

That's great - thanks Davie. Having second thoughts about whether I do actually have points ignition - but I certainly can't see a CDI unit anywhere. I do seem to have 2 ignition coils prior to the plugs - just want to double check before I install a kill switch joining something together and blow up something expensive/irreplaceable!! Hope I've linked to some photos below.



So - I need to install kill switch to complete the circuit across the two black wires going into that connector block when the lanyard is pulled?

[Davie]

your engine has points. yes connect switch across that block or between the orange and grey.

[jonathandorey]

Brilliant - many thanks for the help!