Mercruiser # 1 & R Lower gear case with Pre-load Pin, Ser# 3106717 to 6225576, 1971 - 1982 ("Click" here for individual parts,ie; seals, gear sets, water pump parts, etc.)
18-2652 Alpha Lower Gear Housing Seal Kit $43.00$33.95 18-2652
Replaces Mercruiser part#26-33144A2. For #1/MR/Alpha units sn#1684188 & up.
18-3017 Impeller (only) $20.00$15.95
18-3017
Rplaces #47-89984, 47-89984T, for all #1 Units thru s/n D494568.
18-3217 Impeller Repair Kit (impeller with gaskets) $29.00$22.95 18-3217
Fits all #1/1-R/MR/Alpha One drives. Includes Impeller, gaskets, wear plate, water tube and o'rings
Sierra 18-3517 Water Pump Repair Kit (with top housing) $35.00$27.95 18-3517
Sierra 18-3517 Water Pump Repair Kit (with top housing). Replaces Mercury Outboard and Mercruiser part #46-96148A5, 46-60367A1. Fits all #1/1-R/MR/Alpha One units. (Will not fit Alpha-1, GEN-II). Comes with upper housing, impeller, wear plate, gaskets, water guide tube and o'rings.
18-3417 Water Pump Lower Base (only) $34.00$26.95
18-3417
18-3417 Water Pump Lower Base (only), Replacement for Mercruiser Inboard/Outboard #46-57234A1.
supplied with driveshaft seals.
18-3317 Water Pump Repair Kit (complete w/base) $53.00$41.95 18-3317
Complete Pump housing kit for #1 units without plastic flush screw in gear housing. Complete with upper and lower housings. Covers sn#2763442-6854392.
18-2154 Shift Shaft Bushing (Lower Gearcase) $20.00$15.95
18-2154
Located in the front of drive unit. Seals Vertical stainless steel lower shift shaft. The bushing housing is supplied with o-ring and oil seal to prevent water from entering the lower half of the drive unit.
18-2167 Vertical Drive Shaft (lower) w/pre-load pin$520.00$415.9518-2167
Replaces Mercruiser part #45-41939A1. For all #1 units sn#2791957 & above except MR/Alpha units or units which have been retro-fitted with MR/Alpha lower units. Also for 165 6 cyl sn#2763442 & above.
18-2202 Sliding Clutch Dog $229.00$182.95 18-2202
Replaces Mercruiser part #52-66063.
18-2200 Lower Gear Set - Early Style$702.00$560.9518-2200
Fits #1 Units S/N 3469428 & Up Except MR/Alpha Units which have no preload pin in the top of the drive shaft. Replaces Mercruiser part#43-96084A4.
18-2166 Propeller Shaft (lower unit)$414.00$330.9518-2166
Replaces Mercruiser part #44-66060 & 44-66060-3. For all #1/MR/Alpha units sn#2791957 and above. Also for 165 6 cyl.
sn#2763442 and above.
18-2191 Bearing Carrier Assembly (Lower Gearcase) $110.00$87.95
18-2191
Replaces: Mercruiser Inboard/Outboard #73020A-14. For #1R/MR/ALPHA I, for housings with casting #73020C
18-2299 Tab Washer (for bearing carrier retainer nut) $10.00$7.49
18-2299
For Mercury/Mariner Outboard and Mercruiser Inboard/Outboard Drive Systems. Tab washer to lock bearing carrier nut in place.
18-3751 Retainer Nut (for lower unit "Bearing Carrier") $25.00$19.95
18-3751
Mercruiser #79448 for V-6 outboards and all Sterndrives.
18-3714 Brass Castle Washer (for Propeller Nut) $11.00$8.29
18-3714
Replacement for Mercruiser #12-31211A2. Supports prop nut and locking tabs for prop nut.
18-3701 Propeller Nut Kit (nut and Lock tab) $15.00$11.39
18-3701
Replaces Mercruiser #11-52707A1, propeller retaining
nut and locking tabs.
order toll free: 1-800-382-9335
local: (631)-722-5700
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29 Edgar Avenue - Riverhead, NY 11901 - toll free: 800-382-9335 - p: 631-722-5700 - fax: 631-722-5719 or Email: sales@partman.com
18-2652 Alpha Lower Gear Housing Seal Kit
18-3017 Impeller (only)
18-3217 Impeller Repair Kit (impeller with gaskets)
Sierra 18-3517 Water Pump Repair Kit (with top housing)
18-3417 Water Pump Lower Base (only)
18-3317 Water Pump Repair Kit (complete w/base)
1076156A Screw & Nut Assembly (intake screens)
18-2154 Shift Shaft Bushing (Lower Gearcase)
18-2202 Sliding Clutch Dog 
18-2191 Bearing Carrier Assembly (Lower Gearcase)
18-2299 Tab Washer (for bearing carrier retainer nut)
18-3751 Retainer Nut (for lower unit "Bearing Carrier")
18-4220 Thrust Washer ("Behind" Propeller)
18-3714 Brass Castle Washer (for Propeller Nut)
18-3701 Propeller Nut Kit (nut and Lock tab)
