Mercruiser drain screw plug (lower gearcase)

Aftermarket Mercruiser drain screw / magnetic oil plug and gasket for use with marine engine stern drive units
Fits MC-1 / R / MR / Alpha drive models
Aftermarket Mercury tools for oil plug repair taps are special order helicoils 3/8-16 national coarse thread
Click for Tech support Exploded view outdrive drawings

	Customers who ordered 21731 drain screw also purchased:
51210 GM 120-140 hp manifold parts years 1982-1995	P/N 51210 Unit OEM 806867A8 GM 120 / 140 hp. 4 Cylinder 153 / 181 CID years 1982 - 1995 Contains the following item if required: P/N 51210 Exhaust manifold 806867A8 P/N 33570 Gasket 27-96429 P/N 30920 Gasket-End cap (5) 27- 807218 P/N 31520 Gasket-elbow or adaptor 27- 99777- 2 P/N 51020 End cap 805629A1 P/N 51030 End cap 73813A1 P/N 13980 Straight Fitting Water Drain Contents 22-862557 P/N 13992 Drain Plug Kit (5)22-806608A1 P/N 80140 O-Ring (5) 25-45253 P/N 22443 Screw-End Cap (8) 21-824941 P/N 32180 Gasket-Carburetor Base 27-807982 P/N 22444 Screw Edit 10-807212 P/N 22445 Screw (2) 10-66863-1 P/N 22484 Stud (2) 16-56826 P/N 21892 Plug-Exhaust Elbow 22-41622 P/N 21248 Flange Serrated Nut (5) 11-46335 P/N 22482 Stud-Carburetor (2) 16-70236 P/N 21664 Washer- Carburetor (5) 12-20084 P/N 19354 Lock Nut Carburetor (5) 11-25594 P/N 51210 Exhaust manifold OEM 806867A8 $399.99
87500 GLM aftermarket Mercruiser upper gearcase seal kit	Seal kit 87500. All kits include o-rings, oil seals and gaskets in the upper housing. Remember to use a gasket sealing compound. Replaces OEM 26-32511A1, Sierra 18-2648. M1 / R / MR / Alpha 1 (1964 - 1990) serial numbers 1684188 - OD469858 Includes: P/N 80420 O-ring P/N 25-32546 P/N 80190 O-ring P/N 25-55801 P/N 81180 O-ring P/N 25-25439 P/N 82380 O-ring 25-70937 P/N 85020/85060/85030 Oil seals OEM 26-32511/26-96503/26-823894 P/N 31150 Gasket 27-55810-1 P/N 85150 Grommet 26-36557
21905 Outdrive gimbal bearing	Heavy duty gimbal bearing for Mercruiser outdrive Compatible with Mercruiser 120/140, 470/485, 165, 888, 225/233, 898/228, 250/260, R, MR, Alpha 1/Gen II, Bravo models manufactured in the United States by GLM Marine. Larger area between seals allows for up to 30% more grease filling and low carbon steel cage allows higher temperature operation also included in the GLM bellows kit P/N 21905 Gimbal bearing OEM 30-862540A3, 30-60794A4, 3853807, 983987
88010 Mercruiser outdrive water pump and seal kit	Lower unit water pump P/N 88010 and upper - lower gearcase seal kits $119.99 Compatible with models 1 and R (1970 - 1983) Serial numbers 2663442 - 6225576 Includes: P/N 87500 / 26-32511A1 Upper housing seal set P/N 87510 / 26-33144A2 Lower seal set P/N 89840 / 47-89984T4 Impeller P/N 11070 / 28-56654 Key P/N 12410 / 46-96148T1 Housing P/N 12322 / 46-44292A3 Base P/N 12820 / 23-29804T Guide tube P/N 12810 / 48752 Cup P/N 12510 / 32435 Wear plate P/N 31010 / 27-85608-1 Gasket
	GLM Marine Products aftermarket gears for upper gearcase and lower units all models Outdrive forward, pinion and reverse gears for all models including MC-1 / R / MR and Alpha One and Generation 2 compatible with 120/140 4 cylinder, inline 6 cylinder, V6 and 5.0-5.7 liter V8 motors. Upper and lower unit gear sets with bearings and shims, ratios, years and serial numbers. See our application chart for lower and upper units for help with choosing the right one for your model Limited selection of used gears also available.
90190 Mercruiser tool bearing carrier retainer wrench	P/N 90190 Bearing carrier retainer wrench OEM 91-61069T $112.99 Bearing carrier wrench, bearing puller and pinion nut adapter Shift shaft bushing, outdrive bearing race and seal drivers. Mercury outboard and Mercruiser stern drive prop wrench kit Tools are compatible with Alpha 1 and generation 2, Bravo, MR, and Mercruiser outdrives