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McGard Propeller Locks are fully machined from naval brass and thru-hardened stainless steel and feature a free-spinning collar that will turn, without loosening the lock, when gripped by tools. The locks come with a washer, lock, nut and a black cap.
| PART # | APPLICATION | THREAD |
|---|---|---|
| MGR74039 | Mercury/Mariner 70 HP and larger Mercury Bigfoot 40 HP, 50 HP, 60 HP (4 stroke) Optimax 75 HP and larger Verado 135 HP and larger Johnson/Evinrude 150 HP and larger (2 stroke) | 3/4"-16 |
| MGR74040 | Honda 75 HP and larger Suzuki 40 HP and larger Yamaha 115 HP and larger | M18x1-1/2 |
| MGR74052 | Johnson/Evinrude 40-140 HP (2 stroke) | 5/8"-11 |
