A-AAU8491-AI Heater Plug

One New Aftermarket Replacement Thermostart Heater Plug (Intake Pre-Heater) for Leyland, Marshall, Fits Massey Ferguson, and More

This aftermarket replacement AAU8491 thermostart heater plug mounts in the intake manifold and provides reliable pre-heating for cold-weather diesel engine starting. It features a push-on spade terminal for electrical connection, a 7/8″ UNF mounting thread, and an overall length of approximately 63 mm. The thermostart design ignites a small amount of diesel fuel to heat incoming air, ensuring quick and confident engine starts in cold conditions.

Specifications

• Thread Size: 7/8″ – 14 UNF
• Terminal Type: Spade (push-on)
• Overall Length: 63 mm (approx.)
• Type: Thermostart intake manifold heater plug

Compatible Models

Leyland: 245, 255 (with Sekura cab), 262 (with Sekura cab), 270 (with Sekura cab), 272 (with Sekura cab), 282, 285, 462 (with Sekura cab), 472 (with Sekura cab), 482, 485, 502, 602, 604, 702, 704, 802, 804, 2100, 4100

Marshall: 502, 602, 702, 802, 604, 704, 804, 904XL, 754, 854, 954XL

Fits Massey Ferguson Tractors: 30, 50, 133, 135, 140, 148, 154, 158, 165, 168, 174, 175, 178, 184, 185, 188, 194, 230, 231, 235, 240, 243, 245, 250, 253, 254, 255, 260, 261, 263, 265, 270, 273, 274, 275, 283, 284, 285, 290, 293, 294, 298

Fits Massey Ferguson Backhoe/Industrial: 20, 20B, 20D, 20E, 20F, 30, 30D, 30E, 30H, 40, 40E, 50B, 50D, 50E, 60H, 800

Fits Massey Ferguson Combines: 530, 535, 550, 565, 660, 805, 840, 845

Long Tractors: 260, 260C, 310, 310C, 350, 360, 360C, 445, 445SD, 445V, 460, 460SD, 460V, 510, 550, 560, 610, 610C, 2360, 2460, 2510, 2610

Fits Allis Chalmers: 160, 170, 175, 5040, 5045, 5050

Also fits select Fits Case IH, David Brown, Fits Ford/New Holland, Fits John Deere, Perkins, and Yanmar applications – see cross-reference numbers below for verification.

Replaces Part Number(s):

AAU8491, A-AAU8491, 47P606, A-47P606, 13H2468, 2666108, 1446935M1, 3583543M2, 3583543M1, 893501M91, 1854050, 1854102, AR63103, 3118299R1, 218349A1, A77616, C5NE9A436A, E1NN9A436AA, 81806046, 83933675, 87800843, K928523, K928528, TX12346, 603922, 6A-4050, 245885, 133757, 71700100, PG2666108, 31-2760477

New aftermarket replacement part – not remanufactured, not used.