Sold out -22% sale
Sierra Not Qualified for Free Shipping Sierra Lower Seal Kit #18-8359
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Lower Seal Kit #18-8359 $145.33 $184.58
Sierra 18-8359 SealsLower Seal KitOEM Interchange:VOLVO: 876268Sierra Lower Seal Kit #18-8359Normalized SKU: 188359UPC Code: 808282106027
-22% sale
Sierra Not Qualified for Free Shipping Sierra Lower Shift Cable Kit #18-2600
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Lower Shift Cable Kit #18-2600 $178.72 $226.98
Sierra 18-2600 Shift Cables & PartsLower Shift Cable KitSierra Lower Shift Cable Kit #18-2600Normalized SKU: 182600UPC Code: 030999875112
-20% sale
Sierra Not Qualified for Free Shipping Sierra Lower Shift Cable Kit #18-2603
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Lower Shift Cable Kit #18-2603 $96.79 $120.15
Sierra 18-2603 Shift Cables & PartsLower Shift Cable KitOEM Interchange:MERCURY MARINE: 19543T1Sierra Lower Shift Cable Kit #18-2603Normalized SKU: 182603UPC Code: 030999875136
-22% sale
Sierra Not Qualified for Free Shipping Sierra Lower Shift Cable Kit #18-2603E
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Lower Shift Cable Kit #18-2603E $199.27 $253.08
Sierra 18-2603E Shift Cables & PartsLower Shift Cable KitOEM Interchange:MERCURY MARINE: 19543T1Sierra Lower Shift Cable Kit #18-2603ENormalized SKU: 182603EUPC Code: 808282184247
-22% sale
Sierra Not Qualified for Free Shipping Sierra Lower Shift Cable Kit #18-2604
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Lower Shift Cable Kit #18-2604 $169.95 $215.85
Sierra 18-2604 Shift Cables & PartsLower Shift Cable KitOEM Interchange:MERCURY MARINE: 815471T1Sierra Lower Shift Cable Kit #18-2604Normalized SKU: 182604UPC Code: 030999875143
-22% sale
Sierra Not Qualified for Free Shipping Sierra Lower Shift Cable Kit #18-2604E
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Lower Shift Cable Kit #18-2604E $237.41 $301.52
Sierra 18-2604E Shift Cables & Parts Lower Shift Cable Kit For: Bravo OEM Interchange:MERCURY MARINE: 815471T1 Normalized SKU: 182604EUPC Code: 808282184476
-17% sale
Sierra Qualifies for Free Shipping Sierra Lower Unit Adapter Kit #18-99525
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Lower Unit Adapter Kit #18-99525 $65.15 $78.17
Sierra 18-99525 Engine Tools Lower unit gearcase lube oil filler adapter kit for a variety of gearcases including Mercury, Mariner, Mercruiser, Johnson, Evinrude, Yamaha, Suzuki, Tohatsu, Volvo Penta, Chrysler & Force. Includes 551-334M metric M8 x 1.25P thread adapter Includes 551-334S Suzuki M10 x 1.25P adapter Includes 551-334V Volvo Penta M10 x 1.5P adapter Includes 551-33TN threader 3/8 x 16P nozzle adapter Includes 551-33UN unthreaded nozzle adapter 551-334B Bravo & Verado adapter hose sold separately Compatible with 551-33-1, 34PV & 551-34HA Replaces CDI 551-334K Normalized SKU: 1899525UPC Code: 808282394882
Sold out -22% sale
Sierra Oversized - Not Qualified for Free Shipping Sierra Lower Unit Assembly #18-2443
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Lower Unit Assembly #18-2443 $194.80 $247.41
Sierra 18-2443 AssembliesLower Unit AssemblyOEM Interchange:MERCURY MARINE: 1623-8951A43Sierra Lower Unit Assembly #18-2443Normalized SKU: 182443UPC Code: 808282113834
Sold out -17% sale
Sierra Not Qualified for Free Shipping Sierra Lower Unit Carrier Screw #18-2379
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Lower Unit Carrier Screw #18-2379 $8.63 $10.30
Sierra 18-2379 ScrewsLower Unit Carrier Screw #18-2379OEM Interchange:OMC: 320041Sierra Lower Unit Carrier Screw #18-2379Normalized SKU: 182379UPC Code: 808282243562
Sold out -16% sale
Sierra Not Qualified for Free Shipping Sierra Lower Unit Carrier Screw 4-pk #18-2379-9
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Lower Unit Carrier Screw 4-pk #18-2379-9 $4.96 $5.84
Sierra 18-2379-9 ScrewsLower Unit Carrier Screw (Priced Per Pkg of 4)Sierra Lower Unit Carrier Screw (Priced Per Pkg of 4) #18-2379-9Normalized SKU: 1823799UPC Code: 808282162467
-17% sale
Sierra Not Qualified for Free Shipping Sierra Lower Unit Drain/Fill Screw #18-2387
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Lower Unit Drain/Fill Screw #18-2387 $9.05 $10.80
Sierra 18-2387 ScrewsLower Unit Drain/Fill ScrewOEM Interchange:OMC: 307551Sierra Lower Unit Drain/Fill Screw #18-2387Normalized SKU: 182387UPC Code: 808282239459
Sold out -20% sale
Sierra Lower Unit Drain/Fill Screw 50-pk #18-23871-9
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Lower Unit Drain/Fill Screw 50-pk #18-23871-9 $125.11 $155.30
Sierra 18-23871-9 Screws Lower Unit Drain/Fill Screw (Priced Per Pkg of 50) Features: Fits: OMC V-6, V-4 (1979-Up), 60-75 hp 3 cylinder, 20-35 hp (1985-97) Additional Details: Head Style: Slot Head OEM Interchange: GLM 22420 Johnson/Evinrude Outboard 307551 912625 Mallory 9-72655 OMC Stern Drive 307551 912625 982851 Sierra Lower Unit Drain/Fill Screw (Priced Per Pkg of 50) #18-23871-9 Normalized SKU: 18238719UPC Code: 808282183127
-17% sale
Sierra Not Qualified for Free Shipping Sierra Lower Unit Fill Tube #18-9786
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Lower Unit Fill Tube #18-9786 $26.91 $32.12
Sierra 18-9786 ReservoirFlush and fill tool for small gearcases requiring the 10 ounce tube package. Ideal for "do-it-yourself" in home maintenance. Includes appropriate lower unit fitting for specific applications. Clamshell packed.Sierra Lower Unit Fill Tube #18-9786Normalized SKU: 189786UPC Code: 808282245054
-17% sale
Sierra Lower Unit Fill Tube #18-9787
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Lower Unit Fill Tube #18-9787 $33.00 $39.39
Sierra 18-9787 Reservoir Flush and fill tool for small gearcases requiring the 10-ounce tube package. Ideal for "do-it-yourself" in home maintenance. Includes appropriate lower unit fitting for specific applications. Clamshell packed. Sierra Lower Unit Fill Tube #18-9787 Normalized SKU: 189787UPC Code: 808282235093
-17% sale
Sierra Not Qualified for Free Shipping Sierra Lower Unit Fill/Drain Kit #18-2448
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Lower Unit Fill/Drain Kit #18-2448 $56.15 $67.37
Sierra 18-2448 Drain PlugsSierra Lower Unit Fill/Drain Kit #18-2448Normalized SKU: 182448UPC Code: 808282339746
Sold out -17% sale
Sierra Oversized - Not Qualified for Free Shipping Sierra Lower Unit Housing #18-2415
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Lower Unit Housing #18-2415 $1,118.93 $1,342.71
Sierra 18-2415 HousingsLower Unit HousingOEM Interchange:MERCURY MARINE: 1623-815822A36Sierra Lower Unit Housing #18-2415Normalized SKU: 182415UPC Code: 808282180874
Sold out -15% sale
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Lower Unit Seal Kit #18-1700 $5.78 $6.80
Sierra 18-1700 SealsLower unit seal kit replacement from Sierra International. Components in kit are designed specifically for use within marine environments. Refer to assembly/fit guide for optimal performance and reliability. Application: Yamaha 60TLR/70TLR (2004-Up) Interchange: Yamaha Outboard 6H2-W0001-20-00 Marine seal kits, oil seals For use with marine drive parts Normalized SKU: 181700UPC Code: 808282383183
Sold out -20% sale
Sierra Not Qualified for Free Shipping Sierra Lower Unit Seal Kit #18-2623
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Lower Unit Seal Kit #18-2623 $78.98 $98.05
Sierra 18-2623 SealsLower Unit Seal KitOEM Interchange:OMC: 439141Sierra Lower Unit Seal Kit #18-2623Normalized SKU: 182623UPC Code: 808282243661
-20% sale
Sierra Not Qualified for Free Shipping Sierra Lower Unit Seal Kit #18-2624
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Lower Unit Seal Kit #18-2624 $83.29 $103.39
Sierra 18-2624 SealsLower Unit Seal KitOEM Interchange:CHRYSLER FORCE: 26-85090A2MERCURY MARINE: 26-85090A2Sierra Lower Unit Seal Kit #18-2624Normalized SKU: 182624UPC Code: 808282243678
Sold out -17% sale
Sierra Not Qualified for Free Shipping Sierra Lower Unit Seal Kit #18-2625
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Lower Unit Seal Kit #18-2625 $17.44 $20.81
Sierra 18-2625 Engine GasketsLower Unit Seal KitOEM Interchange:VOLVO: 875192Sierra Lower Unit Seal Kit #18-2625Normalized SKU: 182625UPC Code: 808282257989

Frequently Asked Questions

First Choice Marine is an online marine retailer carrying a diverse line of marine parts and accessories and related items from industry-respected and demanded manufacturers and suppliers. Through our diverse distributor network, we are able to access over 150,000 items, including our current site inventory, new products being added, and special order items. If you need it on your boat... we are your one-stop shop!

Yes, we offer FREE Shipping on most orders over $149 to US-48*.

Each product displays a shipping status message, just above the item price. Below is the meaning for each of these codes.

  • Qualifies for Free Shipping: This item qualifies for free shipping when the order is $149+
  • Qualifies for Free Ground Shipping: This item qualifies for free ground shipping when the order is $149+.
  • Oversized - Not Qualified for Free Shipping: This item is too large/heavy to qualify for free shipping
  • Hazardous Item - Not Qualified for Free Shipping: This item is hazardous and does not qualify for free shipping
  • Truck Freight - Not Qualified for Free Shipping: This item has to be shipped via truck freight. Please contact us for a quote
  • In-Store Pickup Only: This item can only be picked up in our Grain Valley, MO retail store

Below the price of the item, on the product page, there is a message indicating the availability of the product.

The quantity on hand is updated as inventory events happen and matches what we have available. If you have urgent needs and we are close to what you need, contact us, and we can confirm stock.

We offer a hassle-free return policy. If you're not completely satisfied with your purchase, you can return it within 30 days for a full refund or exchange.

If you need to return an item, please follow the guidelines here so we can process a prompt refund and assist you in finding the correct item.

Free Shipping

On most orders $149+ to the continental 48 US states.

Secure Shopping

Fast, secure checkout with a variety of payment methods.

Shop with confidence

25+ years serving the marine industry.

Support center

Need help? Contact us via live chat, phone, or email.

© 2026 First Choice Marine.