Applications include these engines (and the boats that we are aware used these engines... There could be other combinations as well):
• 3JH3BE (Catalina 380 Hull 226 & up, Morgan 381, Catalina 387 Hulls 1 through 60)(need to verify)
• 3JH4E (Early Catalina 375)(need to verify)
• 3JH4BE (Catalina 387 Hull 61+) (need to verify)
• 4JHE (Catalina 42)
• 4JH2GB (Catalina 42)(need to verify)
• 4JH3BE (Catalina 400 hull #155 thru 313, Catalina 42, Morgan 440, Morgan 45)(need to verify)
• 4JH4SBE (Catalina 400 Hull 315 & up)(need to verify)
• 4JH2-HT-BE (Catalina 470)(need to verify)

• Bolt head: 7mm hex, Philips screw driver
• Threads, tapered: ~9.4mm at tip to 9.9mm at body
• Length, overall: ~35mm
• Length, not including threads: ~25mm
• Includes 2 ring terminals for retrofitting to earlier models

1) We carry these parts for your convenience though you may find them elsewhere less expensive due to the manufacturer's restricted distribution.

2) Low oil pressure switch. When closed, this switch causes the alarm / buzzer to sound on the engine panel until the engine starts and the correct oil pressure is achieved. This is not an oil pressure sender. A sender is what drives an oil pressure gauge. This is the proper oil pressure on-off switch that activates the low oil pressure warning light and warning buzzer in the event of low oil pressure.

3) Regardless if you are installing an oil pressure sender or an oil pressure switch, never add any type of Teflon tape or pipe joint compound on the threads. The sender or switch are modulating the connection of the instrument to ground by way of the engine block. If you insulate the threads, they can't make the connection to ground and the instrument will not function properly.