Standard 12 volt marine ignition coil is designed to be used with external resistor.

• 12 volt 1.5 ohm ignition coil
• Replaces Crusader 37068
• Replaces OMC 383444, 378231, 3852217
• Replaces Volvo Penta 3852217
• Replaces Prestolite 5-69
• Replaces Mallory 9-29705
• Replaces Volvo Penta 3852217

This is a 1.5 Ohm coil used on breaker point & BID ignitions.

Coil says "Use with external resistor" even though some application (BID) did not use a external resistor.

Primary studs are off center for many OMC/Volvo applications.