The best thing about engine driven refrigeration
other than not needing to worry about expensive direct current
power management is all replacement parts
are available most any where in the world.
Seawater to refrigerant or seawater to oil
heat exchangers are generally interchangeable. The condenser you describe with 1 ¼ inch hoses sounds like a marine
engine or transmission oil heat exchanger
commonly used around the world in engine driven refrigeration
. It is important that these heat exchangers be constructed from saltwater resistant marine
brass. Unlike other type tube in tube air conditioning
condensers seawater passes through multiple small tubes on your heat exchanger
. Most charter
boat and engine driven refrigeration manufactured outside the US use the type heat exchanger. Technautics in this country used multiple tube heat exchangers like yours on their engine driven pleasure boat refrigeration utilizing cooling
water to remove refrigeration process heat before interring engine.
On engines having seawater pump and hoses larger than ¾ of an inch operating in less than tropical water temperatures a seawater adjustable water bypass around condenser is recommended.