Perkins 4.154 Thermostart

[hummingway]

I've got a thermostart on my Perkins 4.154 and I'm trying to figure out how to connect it. So far I'd say positive and negative off the battery. Positive through an impulse switch and both to a solenoid relay. Now I'm stuck. The thermostart has one large blade (easily a quarter inch) that appears to be for a connection but that is it. I would have expected positive and negative terminals.

[Laidback]

Originally Posted by hummingway

I've got a thermostart on my Perkins 4.154 and I'm trying to figure out how to connect it. So far I'd say positive and negative off the battery. Positive through an impulse switch and both to a solenoid relay. Now I'm stuck. The thermostart has one large blade (easily a quarter inch) that appears to be for a connection but that is it. I would have expected positive and negative terminals.

This any help ?

[hummingway]

Maybe. Does this imply that the ground is internal to the unit?

[johnar]

it is common for the motor to be the ground, so yes

[hummingway]

Thanks. I guess that makes it simple.

[Laidback]

Originally Posted by hummingway

Thanks. I guess that makes it simple.

This clearer ?

[johnar]

lol X marks the spot.