For use with TAT Models 8402 & 8905 Digital Tachometers. Your Fisheries Supply salesperson to tell you the correct tachometer sender or sensor to purchase is the make and model of your engine.
Single output senders and sensors (single pair of wires) produce enough power to run up to 5 tachometers
Dual output senders and sensors (two pairs of output wires) are typically used when an auxilliary instrument, such as an electronic engine control, requires engine speed input
On mag-pickup sensors, the installed length is adjustable; thread size is determined by the port on the engine
The #8619 adapter is necessary for Ford Lehman engines (typically 1977 and later) which do not come with a factory-installed housing for a mechanical sender; similar adapters are available for Perkins and Volvo engines
The #8152 replacement drive pin is typically needed for new installations on pre-1976 engines which won't accept the newer 0.187" drive pin that comes on new senders