Massey Ferguson Tractor Engine Starter Motor | OEM 1680064M1

Buy enough parts catalogues and you learn that the difference between two "identical" starters is usually one dimension nobody thought to print. The 1680064M1 is MF's reference for the Lucas M45G — the strengthened version of the classic M45, wound to 2.7 kW by the WAI listing, twelve volts, ten-tooth pinion turning clockwise, and carrying a 92 mm three-hole flange where its sibling measures 89.

Massey Ferguson fitted it to a long run of models — the 133 and the 135 were early users in the sixties, then came the 140 and the 145, the 148 and the 152, and by the seventies the 155, the 165 and eventually the 230, 245 and 255 were all leaving the works with one. Weight is a useful tell on this family: Mahle's MS343 puts the official figure at 11.82 kg, so a unit that looks like a small M45 in a thumbnail but lifts like a proper heavyweight has already told you which family it belongs to.

OEM and Search References

• Primary MF reference: 1680064M1, with MF cross numbers 1680065M1 / M3, 1903119M91, 26264R, 3597426R2, 3930505R1, 535388M91, 579395M91 and 887057R2 describing closely related units
• Manufacturer codes on the same part: Lucas LRS190 and 27571, WAI 17645N in the M45G series, Mahle MS343, Perkins 2873A012T, plus Lucas 26412
• Buyer search terms: 1680064M1 starter, MF 135 starter motor, Massey Ferguson 140 starter, MF 155 starter 12V, Lucas M45G starter, WAI 17645N
• Ratings: 12 V, 2.7 kW, 10 teeth, CW, weight 11.82 kg — aftermarket power figures vary 1.8 to 3.2 kW across brands; the old unit's plate is the authority

Fitment and Purchase Checks

What makes this number worth a careful order is the company it keeps. Several cross tables list it alongside 1680065M1 — the plain M45 with its 89 mm flange — and both numbers genuinely did serve overlapping tractors, which is why a buyer working from a photocopied catalogue can end up with a starter that bolts to the engine but never quite reaches the flywheel. The years overlap hopelessly as well: a 135 built from 1964, a 140 from 1966, a 148 not until 1972, a 155 in between, a 133 from 1969, a 165 from 1964, with the 230 and 255 trailing in during the mid-seventies — which is exactly why the dates help less than the flange measurement does.

So before anything else, measure the old unit across its mounting face. Read what the plate still says, count the pinion teeth while you are at it, and put all three facts in the enquiry; that takes a minute and it beats every catalogue on the shelf. The reply will be a firm quote rather than a maybe: unit price, carton quantity, a dispatch window, warranty terms for the destination market, and if the plate describes something the cross tables muddle, it gets traced through the MF parts system before the order is confirmed, not after the box is open in a workshop on another continent.