Sierra 18-3731 Locknut
Ships: In 5 Business Days
Additional Details:
- Size: 3/4" or 19.1mm - 16
Cross References
Johnson/Evinrude Outboard
- 310422
OMC Stern Drive
- 307866
- 310422
- 907866
Fitment Information
Johnson/Evinrude
- 100 HP 1968-1968 100hp 2 stroke 4 cylinders
OMC
- 100 hp 1972-1973 100hp 4 stroke 4 cylinders
- 120 hp 1971-1981 120hp 4 stroke 4 cylinders
- 140 hp 1973-1981 140hp 4 stroke 4 cylinders
- 155 hp 1971-1972 155hp 4 stroke 6 cylinders
- 165 hp 1972-1975 165hp 4 stroke 6 cylinders
- 170 hp 1974-1974 170hp 4 stroke 8 cylinders
- 175 hp 1975-1975 175hp 4 stroke 8 cylinders
- 185 hp 1978-1978 185hp 4 stroke 8 cylinders
- 190 hp 1974-1975 190hp 4 stroke 8 cylinders
- 200 hp 1981-1981 200hp 4 stroke 8 cylinders
- 215 hp 1971-1971 215hp 4 stroke 8 cylinders
- 225 hp 1972-1978 225hp 4 stroke 8 cylinders
- 230 hp 1981-1981 230hp 4 stroke 8 cylinders
- 235 hp 1971-1975 235hp 4 stroke 8 cylinders
- 240 hp 1978-1978 240hp 4 stroke 8 cylinders
- 245 hp 1972-1975 245hp 4 stroke 8 cylinders
- 2.5 liter 1982-1985 4 stroke 2.5 liters 4 cylinders
- 260 hp 1981-1981 260hp 4 stroke 8 cylinders
- 3.8 liter 1981-1985 4 stroke 3.8 liters 6 cylinders
- 3 liter 1982-1985 4 stroke 3 liters 4 cylinders
- 4.3 liter 1985-1985 4 stroke 4.3 liters 6 cylinders
- 5.7 liter 1982-1985 4 stroke 5.7 liters 8 cylinders
- 5 liter 1982-1985 4 stroke 5 liters 8 cylinders
- 8.2 liter 1984-1985 4 stroke 8.2 liters 8 cylinders
- 90 hp 1971-1971 90hp 4 stroke 4 cylinders
Please be aware that all products have a production or warehouse lead time. This is the number of business days (typically not including the day the product was ordered) that must pass before the item begins the shipping process. Please see the "Ships: In" information located within the main product description to the right of the product image and below the ADD TO CART button for that particular product's "Ships: In" timeframe.
IMPORTANT: Please note that these timeframes are estimates only based on the latest information provided to us by the manufacturer/supplier. Delays in both material, production and shipping timeframes by manufacturers can vary without advanced notice and while we do our best to keep "Ships: In" timeframes up to date we may not always be able to do so due to a variety of factors.
If a product is needed by a specific date we strongly recommend you reach out to our Sales team (1-800-869-1686) to verify shipping timeframes.
Canadian orders please add an additional 14 business days for processing and shipping. Alaska and Hawaii orders please add 1 additional warehouse processing day.
Click here to see our Standard Shipping Policy
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