Johnson Vernatherms

[cs28461]

1992 88 hp Johnson

Is the Vernatherm the device that sits just about the spark plug that has a wire attaching to where the tilt/trim relays are housed?

 

[ezeke]

Re: Johnson Vernatherms

No, the vernatherm is a kind of thermostat used in some thermostat housings.

The part with the tan wire leading from the cylinder head(s) is correctly called a temperature switch.

 

[cs28461]

Re: Johnson Vernatherms

Am I missing the temperature switch on iboats?

http://www.iboats.com/Johnson_Outboard_Cooling_Parts/dm/view_id.271266

If so - any idea where I can get the part?

 

[ezeke]

Re: Johnson Vernatherms

No. You have to get them from a BRP/Evinrude dealer. http://shop.evinrude.com/

They don't usually go bad, What happened?
http://dealerlocator.evinrude.com/en/410000.shtml

 

[cs28461]

Re: Johnson Vernatherms

Connection is very loose from the wire to the screwed in sensor . Pops out from any small engine shake.

 

[ezeke]

Re: Johnson Vernatherms

That should be a crossflow model with the temperature switch held in place by the water cover on the cylinder head. They are sealed in with a rubberized material like 3M 847 to keep them from leaking. You have to take the water cover off to service them.

 

[kenmyfam]

Re: Johnson Vernatherms

My motor has the vernatherm's in place. I believe there is a conversion should you choose to change to regular thermostats. Mine are fine so far.