Sold out -15% sale
Sierra Not Qualified for Free Shipping Sierra Housing to Tank Gasket #18-2881
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Housing to Tank Gasket 3"x 2-1/4" #18-2881 $2.18 $2.56
Sierra 18-2881 Engine Gaskets Sierra Housing to Tank Gasket 3"x 2-1/4" #18-2881 OEM Interchange:OMC: 125530OMC: 332403 Gaskets: Fuel Tank Sierra Housing to Tank Gasket #18-2881 Normalized SKU: 182881UPC Code: 808282258405
-17% sale
Crusader Qualifies for Free Shipping Crusader SS Block-Off Plate #97296
00
DAYS 00
HRS 00
MIN 00
SEC
Crusader Crusader SS Block-Off Plate #97296 $9.01 $10.75
Crusader 97296 Engine Gaskets Crusader exhaust block off plate Fits Crusader V8 small block 283, 305, 307, 327, and 350 cu. in. marine engines up to approximately 1991 Fits Crusader V8 big block 454 and 502 cu. in. marine engines up to approximately 1991 Stainless steel Separates engine antifreeze from raw water Requires (2) P/N 96562 or (2) P/N 96108 gaskets – sold separately Original Crusader Replaces Osco 7296 Normalized SKU: 97296
Sold out -16% sale
Sierra Not Qualified for Free Shipping Sierra Block Cover Gasket #18-2805
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Block Cover Gasket #18-2805 $4.81 $5.66
Sierra 18-2805 Engine GasketsSierra Block Cover Gasket #18-2805OEM Interchange:MERCURY MARINE: 27-85490-2Gaskets: Block CoverSierra Block Cover Gasket #18-2805Normalized SKU: 182805UPC Code: 808282258061
-16% sale
Indmar Qualifies for Free Shipping Indmar Thermostat Housing Gasket #551004
00
DAYS 00
HRS 00
MIN 00
SEC
Indmar Indmar Thermostat Housing Gasket #551004 $3.45 $4.06
Indmar 551004 Engine Gaskets Seals thermostat upper housing to intake manifold or lower thermostat housing. Indmar thermostat housing gasket Center hole measures 1-7/8" Center-to-center bolt holes measure 3-1/4" Replaces Crusader RM0121 Normalized SKU: 551004
Sold out -15% sale
Sierra Not Qualified for Free Shipping Sierra Gasket Riser to Manifold Priced Each #18-0677-1
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Gasket Riser to Manifold Priced Each #18-0677-1 $7.45 $8.76
Sierra 18-0677-1 Engine GasketsSierra Gasket Riser to Manifold Priced Each #18-0677-1Normalized SKU: 1806771UPC Code: 808282360214
-23% sale
Sierra Not Qualified for Free Shipping Sierra Gasket Fuel Pump Mounting Yamaha #18-0849
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Gasket Fuel Pump Mounting Yamaha #18-0849 $2.92 $3.78
Sierra 18-0849 Engine GasketsSierra Gasket Fuel Pump Mounting Yamaha 18-0849Normalized SKU: 180849UPC Code: 808282291204
-15% sale
Sierra Qualifies for Free Shipping Sierra Drain Fill Washer #18-4698
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Drain Fill Washer #18-4698 $2.33 $2.74
Sierra 18-4698 Engine Gaskets The Sierra 18-4698 Drain Fill Washer is interchangeable with the following: Mallory 9-60100, Mercury 27-81987M, 27-81987, Yamaha 90430-08020-00, 604-45342-00-00, 90430-08801-00. Each Sierra product meets or exceeds the original equipment part it replaces.  Sierra Drain Fill Washer Meets or exceeds the original equipment quality Interchangeable with the following: Mallory 9-60100, Mercury 27-81987M, 27-81987, Yamaha 90430-08020-00, 604-45342-00-00, 90430-08801-00 Fit specific, check part numbers to ensure proper fit OEM Interchange:MERCURY MARINE: 27-81987MERCURY MARINE: 27-81987MYAMAHA: 90430-08020-00YAMAHA: 90430-08801-00YAMAHA: 90430-08003-00YAMAHA: 604-45342-00-00 Normalized SKU: 184698UPC Code: 030999875822
-22% sale
Sierra Not Qualified for Free Shipping Sierra Overhaul Gasket Set #18-4384
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Overhaul Gasket Set #18-4384 $160.40 $203.72
Sierra 18-4384 Engine GasketsOverhaul Gasket SetSierra Overhaul Gasket Set #18-4384Normalized SKU: 184384UPC Code: 030999563477
-17% sale
Sierra Inner Exhaust Plate Gasket #18-2611
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Inner Exhaust Plate Gasket #18-2611 $65.34 $78.41
Sierra 18-2611 Engine GasketsInner Exhaust Plate GasketOEM Interchange:MERCURY MARINE: 27-812775-5Sierra Inner Exhaust Plate Gasket #18-2611Normalized SKU: 182611UPC Code: 808282145712
-16% sale
Sierra Not Qualified for Free Shipping Sierra OMC Outdrive Gasket Set #18-2613
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra OMC Outdrive Gasket Set #18-2613 $7.53 $8.86
Sierra 18-2613 Engine GasketsOutdrive Gasket Set. Fits all Cobra outdrives.OEM Interchange:OMC: 508105Sierra OMC Outdrive Gasket Set #18-2613Normalized SKU: 182613UPC Code: 030999312556
Sold out -17% sale
Sierra Not Qualified for Free Shipping Sierra Outer Exhaust Plate Gasket #18-2610
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Outer Exhaust Plate Gasket #18-2610 $66.87 $80.24
Sierra 18-2610 Engine GasketsOuter Exhaust Plate GasketOEM Interchange:MERCURY MARINE: 27-812775-4Sierra Outer Exhaust Plate Gasket #18-2610Normalized SKU: 182610UPC Code: 808282145705
-15% sale
Indmar Qualifies for Free Shipping Indmar Thermostat Gasket Late Model #531058
00
DAYS 00
HRS 00
MIN 00
SEC
Indmar Indmar Thermostat Gasket Late Model #531058 $4.15 $4.88
Indmar 531058 Engine Gaskets Triangular-shaped 3 bolt-hole gasket seals the upper thermostat housing to the lower housing. Indmar 3-bolt upper thermostat housing gasket Used on Indmar GM 5.7L marine engines Original Indmar Normalized SKU: 531058
-17% sale
Crusader Qualifies for Free Shipping Crusader Gasket Exhaust Elbow 6.0L #RM0274A
00
DAYS 00
HRS 00
MIN 00
SEC
Crusader Crusader Gasket Exhaust Elbow 6.0L #RM0274A $66.11 $79.33
Crusader RM0274A Engine GasketsSeals the are between exhaust manifold and exhaust riser on Crusader 6.0L marine engines. Original Crusader exhaust elbow gasket Used on Crusader 6.0L marine engines Replaces Crusader RM0274 Normalized SKU: RM0274A
-17% sale
Crusader Qualifies for Free Shipping Crusader Big Block Manifold to Head Gasket #96653
00
DAYS 00
HRS 00
MIN 00
SEC
Crusader Crusader Big Block Manifold to Head Gasket #96653 $22.17 $26.46
Crusader 96653 Engine Gaskets Gasket seals between exhaust manifold and cylinder head on Crusader GM 7.4L & 8.2L big block marine engines. Crusader exhaust manifold gasket For Crusader GM V8 454 cu. in. and 502 cu. in. engines Original Crusader Replaces Quicksilver 27-46820 Replaces Osco CW-GH Replaces Mallory 9-61400 Normalized SKU: 96653
Sold out -17% sale
Sierra Exhaust Elbow Gasket #18-2875-1
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Exhaust Elbow Gasket #18-2875-1 $8.51 $10.16
Sierra 18-2875-1 Engine Gaskets For: Volvo 3.0L GS, GL. GLM, GLP, GSM, GSP Use With: 18-1922: Manifold Elbow Sierra Exhaust Elbow Gasket #18-2875-1Normalized SKU: 1828751UPC Code: 808282365721
-21% sale
Sierra Not Qualified for Free Shipping Sierra Exhaust Manifold Gasket #18-2896-1
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Exhaust Manifold Gasket #18-2896-1 $15.61 $19.55
Sierra 18-2896-1 Engine GasketsAdditional Details: Fits: MCM 110 & 120 (1963-1982) For: GM 4 cyl. 153cu.in. Early models 110/120 where the carb linkage mounts to the rear of the engine Use With: 18-1904: ManifoldNormalized SKU: 1828961UPC Code: 808282360160
-17% sale
Crusader Qualifies for Free Shipping Crusader Gasket #RM0240
00
DAYS 00
HRS 00
MIN 00
SEC
Crusader Crusader Gasket #RM0240 $30.55 $36.46
Crusader RM0240 Engine Gaskets TBI to Intake Manifold Adaptor Gasket Replaces Crusader 47007 Replaces Pleasurecraft Marine RM0240 Normalized SKU: RM0240
Sold out -15% sale
Sierra Not Qualified for Free Shipping Sierra Thermostat Cover Gasket #18-2729
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Thermostat Cover Gasket #18-2729 $3.66 $4.30
Sierra 18-2729 Engine GasketsThermostat Cover GasketOEM Interchange:MERCURY MARINE: 27-8128672Sierra Thermostat Cover Gasket #18-2729Normalized SKU: 182729UPC Code: 808282145828
-17% sale
Sierra Qualifies for Free Shipping Sierra Outdrive Gasket Set #18-2619-1
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Outdrive Gasket Set #18-2619-1 $9.33 $11.14
Sierra 18-2619-1 Engine GasketsOutdrive Gasket SetOEM Interchange:MERCURY MARINE: 27-64818A3MERCURY MARINE: 27-94996Q2MERCURY MARINE: 27-94996T2Sierra Outdrive Gasket Set #18-2619-1Normalized SKU: 1826191UPC Code: 808282120207
-17% sale
Sierra Not Qualified for Free Shipping Sierra Adapter Plate Gasket #18-0336
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Adapter Plate Gasket #18-0336 $16.59 $19.80
Sierra 18-0336 Engine GasketsAdapter Plate GasketOEM Interchange:MERCURY MARINE: 27-41670-3MERCURY MARINE: 27-41670-5Sierra Adapter Plate Gasket #18-0336Normalized SKU: 180336UPC Code: 030999873255

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.