Suzuki water alarm float switch

[David G]

Hi,
I am slowly making progress down the route of finding out what is wrong with my DT85.....

The symptoms are that there is no audio/visual water alarm when the ignition is on and the engine will not run at WOT as if it is in rev limit.

I am not convinced that the two are linked but they may be. I have changed the spark plugs and it seems to idle much better but I have not been able to run it under load yet.

Moving to the water alarm, I have removed the float switch and have discovered that not a lot changes on the three wires with float position!

The switch has 3 wires:
black which I am sure is earth.
Green/Red which seems to get 12V from the CDI
Purple/White back into the CDI.

Now if I measure the resistance between the coloured wires and the black then irrespective of float position I get opne circuit for Green/Red and about 80kOhms for the Purple/White.

So I think the float switch has expired, would you agree?

If so, where do I get a replacement?

Cheers,

Orve.

[Neil Harvey]

Hi,

No idea on the technical bits you mention below, but try International Marine Supplies. I think they bought all the Suzi spares for the older outboards, or so I was told. They may be able to help.
http://www.imsupplies.co.uk/

I had a problem with a Suzuki 65 some time ago, whereby it kept cutting the revs back after running at WOT for 30 secs or so.

I think it was eventually cured by replacing a sensor on the back of the head that had fallen to bits and been silicone sealed in by a previous owner.

Hope that helps a bit.

Neil

[David G]

Neil,
Thanks for your help.

Orve.

[David G]

Originally Posted by Orville

The switch has 3 wires:
black which I am sure is earth.
Green/Red which seems to get 12V from the CDI
Purple/White back into the CDI.

Now if I measure the resistance between the coloured wires and the black then irrespective of float position I get opne circuit for Green/Red and about 80kOhms for the Purple/White.

So I think the float switch has expired, would you agree?

Didn't get much input on this last time..hoping someone else might have an idea for me.....before I purchase a replacement unit.

I think the black to Purple/White wire circuit is a temperature monitor as the resistance varies when I put it in a mug of hot water!

The Green/Red has 12V from the CDI but there is no variation at all dependent on float position.

What I am wondering is if this part of the assembly should be a pure open/closed circuit; ie taking the 12V to ground on correct water flow?

Any Suzuki engineers out there?

Cheers,

Orve.