Engine Tachometer Sender Requirements
Engine Type Engine Model Sender Comments
Gasoline Inboard 3, 4, 6, 8 Cylinder
Alternator’s
Stator AC
Terminal or
Point Side of
the Coil
N/A
Gasoline Outboard 4, 6, 8, 14 Pole
Alternator’s
Stator AC
Terminal or
Point Side of
the Coil
N/A
Diesel Caterpillar
Most Older & 3208, D336, D346,
D348, D398, D399 & D334
8902 N/A
Diesel Caterpillar
3116, 3126, 3176, 3196, 3406,
3408, 3306, 3412, 3056, 3512 &
3516
8922
Some use 8912. New engines have
Magnetic Pickup already installed on
flywheel.
Diesel Caterpillar All Electronic N/A Use ECM output. Outputs 12 PPR.
Diesel Cummins Most Older & 555 8902 N/A
Diesel Cummins
B & C Series, KTA19M3, MTA855, *
KTA1150M
8912
Most have Magnetic Pickup already
installed on flywheel.
Diesel Detroit DDEC Electronic System 8902
Must have Detroit data-link output
module.
Diesel Detroit 53, 71, & 92 Series 8902
Engines manufactured before 1976 use
Aetna Part No. 8152 drive key with
Sender.
Diesel Detroit
8.2 Liter 2 Cycle, Some 71 & 92
Series
8912 N/A
Diesel EMD Mechanical Sender Applications 8902 N/A
Diesel EMD Flywheel Applications 8912 N/A
Diesel Hino All Engines 8902
250 HP: Tach drive on front Port side of
engine.
310HP: Tach drive on rear center, just
below the head.
Diesel John Deere Older Engines 8902
Tach drive usually at rear Starboard side
of engine.
Diesel John Deere Newer Engines 8912
Magnetic Pickup usually already
installed.