What is this epectrical component?

[hd002e]

There are cables coming from this to the diesel fuel pump on a 35B Westerbeke. There are no markings on it. I am guessing some kind of relay but not sure what each post connectors are.

I also need a way to test it. Thank you!

[Sand crab]

Solenoid?

[GordMay]

Fuel Solenoid? ➥ https://www.sbmar.com/articles/fuel-...id-wiring-101/

[GordMay]

Fuel Solenoid? ➥ https://www.sbmar.com/articles/fuel-...id-wiring-101/
The larger gauge wires run from +12V supply to starter motor.
The smaller wires run from start switch to negative ground.

[GordMay]

Fuel Solenoid? ➥ https://www.sbmar.com/articles/fuel-...id-wiring-101/
The larger gauge wires run from +12V supply to starter motor.
The smaller wires run from start switch to negative ground.

[Lowcountry]

Definitely a solenoid.

[Spot]

In the first picture, does it look like the case is cracked on the left side?

[Nord Sal]

My W52 uses a solenoid like that for the glow plugs.

[Dogscout]

That is a Solenoid. Was used on just about every ford car or truck in the 1960's and 70's as a starter solenoid. Local autoparts store should have a pile of them.

[team karst]

Originally Posted by Dogscout

That is a Solenoid. Was used on just about every ford car or truck in the 1960's and 70's as a starter solenoid. Local autoparts store should have a pile of them.

correct; but can be had in continuous or intermittent duty. As mentioned, the case is violated, replace it.

[Bycrick]

Not only are there "intermittent" and “continuous" duty solenoids, but some of the Westerbeke ones had an "extra" connection that supplied power to the RUN solenoid and fuel pump during preheat. This internal connection was prone to opening. Almost all the solenoids LOOK the same, but you shouldn’t just assume that they’re wired the same. The two large terminals are always the switched circuit. The two small terminal configurations that I remember are:
1. One terminal to the coil+. The other not used as the - side of the coil is grounded to the mounting case.
2. One terminal to the coil+. The other to the coil-.
3. One terminal to the coil +. The case is connected to the coil- as in #1. The remaining terminal is isolated when the relay is open, and connected to BOTH the large terminals when the relay is energized.

[AndyEss]

Originally Posted by Nord Sal

My W52 uses a solenoid like that for the glow plugs.

Glow plugs draw a lot of current. This looks like a solenoid controlled relay switch.
Diesel fuel flow control solenoids usually have an external plunger that physically moves a lever that in turn, opens or stops fuel flow into the fuel pump.

Just ask for a chronosyncratic infindibulator at the parts store.

[team karst]

I wish my glow plugs were fed from such a contactor. As it is, the little cube relay push on flag connectors are not doing well.

[Boatyarddog]

Originally Posted by hd002e

There are cables coming from this to the diesel fuel pump on a 35B Westerbeke. There are no markings on it. I am guessing some kind of relay but not sure what each post connectors are.

I also need a way to test it. Thank you!

A high current relay, like used in a Ford start circuit.
You really cannot tell if it will pass spec. Current.

But simple on/off is achieved by supplying a ground to the mount and a Battery POS to the small stud marked S.

Then also, the other small stud will pass current, then stops passing current when the Solenoid is de-energized.

This should produce a noticeable sharp "Click" sound and will then pass current
across the bigger 5/16" studs, how much can only be ascertained by installation in series, with an amp meter, to an appropriate load, i.e.: starter.
Boatyarddog

[Boatyarddog]

Originally Posted by AndyEss

Glow plugs draw a lot of current. This looks like a solenoid controlled relay switch.
Diesel fuel flow control solenoids usually have an external plunger that physically moves a lever that in turn, opens or stops fuel flow into the fuel pump.

Just ask for a chronosyncratic infindibulator at the parts store.

I've known them to be labeled "isomatic defragmagulators" as well.
Rare birds!
Boatyarddog