Guess what this is

[Timdogg]

Nice! next?

[tipper75]

Slave cylinder. More specifics: MAZDA,FORD Clutch Slave Cylinder W023-41-920.

[donaud]

It is an hydraulic ram. Single action from the lack of threads on the end.

Yeah, C'MON tipper... be more specific !!

LOL

[Timdogg]

more specific (two words)

[tipper75]

It is an hydraulic ram. Single action from the lack of threads on the end.

[Timdogg]

Next:

[tipper75]

Exactly

[Timdogg]

I think i got it! I should have read your clues at bit more closely!

Keel cooler?

[tipper75]

Not for heating or holding tanks

[Timdogg]

I usually can get the marine ones, but I'm kinda stumped, did a little research and my best guess is: cooling coils for regulating the temp in the holding tanks?

[donaud]

I know nothing about lobster trapping, but I'll guess it's some kind of heated lobster trap.

The cozy heat lures them in ??

[tipper75]

Not at all... why ??

This is a common piece of equipment used on the vessel that catch the critters.

Heating element

I thought you would get this easily. Something is heated, but that is not the function.

[Timdogg]

Heating element

[donaud]

Do you like lobster?

Not at all... why ??

[tipper75]

Heat exchanger is correct, but not specific enough. The slats are metal. No, it is not a thermocouple. Do you like lobster?