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Mercruiser #1-R Gear Housing Components Exploded View
Mercruiser Gear Housing Components Exploded View Diagram and Parts
Fits #1-R
Fits #1-R
| Figure # | Description | O.E.M. # | Sierra # |
|---|---|---|---|
| 1 | Lower Gear Housing | 18-2402 | |
| 2 | Water Tube Guide | 23-29804 | 18-3109 |
| 3 | Bushing/Water Pump Housing | 26-38970 | 18-3110 * |
| 4 | O-Ring, Upper - Drive Shaft | 25-30613 | 18-7158 * |
| 5 | Slinger | 25-30221 | 18-7426 |
| 6 | Stainless Steel Locknuts (1) (5/16 -24) | 11-45592 | 18-3723 |
| 7 | Stainless Steel Locknuts (2) (1/4 -28) | 11-20361, 11-35888 | 18-3722 |
| 8 | Washer | 12-36001 | 18-4270 |
| 9 | Screw | 10-30720 | 18-3226 |
| 10 | Washer, Water Pump Body | N/A | |
| 11 | Upper Pump Housing | 46-96148A1 | 18-3116 |
| 12 | Insert Cup | 48752 | 18-3114 |
| 13 | Impeller | 47-89984 | 18-3017 |
| 14 | Drive Key | N/A | |
| 15 | Gasket, Upper Water Pump to Wear Plate (upper) | 27-85609-1 | 18-2915 * |
| 16 | Impeller Plate | 32435 | 18-3117 |
| 17 | Gasket, Upper Water Pump to Wear Plate (lower) | 27-85608-1 | 18-2914 * |
| 18 | Dowel Pin | 17-35973 | 18-3227 |
| 19 | Water Pump Base | 46-57234A1 | 18-3417 |
| 20 | Oil Seal (upper) | 26-16977 | 18-2026 * |
| 21 | Oil Seal (lower) | 26-89238 | 18-2014 * |
| 22 | O-Ring | 25-90011 | 18-7176 *, 18-7196 * |
| 23 | Gasket, Water Pump Base to Gear Housing | 27-85610-1 | 18-2826 * |
| 24 | Spring | N/A | |
| 25 | Tapered Roller Bearing | 31-53079A1 | 18-1164 |
| 26 | Shim (s), Drive Shaft Bearing | 15-57007A | 18-2295 |
| 27 | Drive Shaft | 45-41939A1 | 18-2167 |
| 28 | Insert, Water Pickup | N/A | |
| 29 | Screw, Insert to Gear Housing | 10-76156 | 18-3197 |
| 30 | Nut, Insert Screw | 11-45812 | 18-2344 |
| 31 | Screw, Trim Tab to Gear Housing Gear Housing | N/A | |
| 32 | Dowel Pin, Gear Housing to Drive Shaft Housing | N/A | |
| 33 | Stud, Water Pump to Gear Housing (3 - 1/4") | N/A | |
| 34 | Stud, Gear Housing to Drive Shaft Housing (1 - 31/32) | N/A | |
| 35 | Stud, Water Pump to Gear Housing (3 - 3/8") | N/A | |
| 36 | Stud, Gear Housing to | N/A | |
| 37 | Oil Passage Seal | 26-45577 | 18-2944 * |
| 38 | Plug, Oil Fill/Drain | 10-79953A2 | 18-2244 |
| 39 | Gasket, Gear Housing Drain Screw | 12-19183, 12-20260 | 18-2945 * |
| 40 | Nut (2) Gear Housing to Drive Shaft Housing | N/A | |
| 41 | Screw, Gear Housing to Drive Shaft Housing | 10-30206 | 18-2361 |
| 42 | Trim Tab | 31640A1 | 18-6011 |
| 43 | Needle Roller Bearing | 31-92366A1 | 18-1150 |
| 44 | Lower Unit Gear Set (pinion gear) | 23-96084A4 | 18-2200 |
| 45 | Pinion Nut | 11-35921 | 18-3719 |
| 46 | Shift Shaft Washer | 12-29395 | 18-4267 |
| 47 | Washer, Rubber Shift Shaft Bushing | 12-31266 | 18-2340 |
| 48 | Oil Seal | 26-89236 | 18-2009 * |
| 49 | Shift Bushing | 23-30617A2 | 18-2154 * |
| 50 | O-Ring | 25-25439 | 18-7153 * |
| 51 | Washer, Lower Shift Shaft Bushing | N/A | |
| 52 | Retaining Clip, Shift Shaft | 53-29641 | 18-4295 |
| 53 | Stainless Steel Shift Shaft | 77481-1 | 18-2150 |
| 54 | Cotter Pin, w/Shift Spool Assembly | 19755A | 18-2196 |
| 55 | Sleeve, w/Shift Spool Assembly | 19755A | 18-2196 |
| 56 | Retainer Spring, w/Shift Spool Assembly | 19755A | 18-2196 |
| 57 | Washers, w/Shift Spool Assembly | 19755A | 18-2196 |
| 58 | Spring, w/Shift Spool Assembly | 19755A | 18-2196 |
| 59 | Spool, w/Shift Spool Assembly | 19755A | 18-2196 |
| 60 | Shift Crank | 76865 | 18-2130 |
| 61 | Shaft, w/Shift Spool Assembly | 19755A4 | 18-2196 |
| 62 | Shim, Forward Gear Bearing | 15-47397A1 | 18-2285 |
| 63 | Tapered Roller Bearing | 31-35928A1 | 18-1159 |
| 64 | Needle Roller Bearing | 31-30895 | 18-1157 |
| 65 | Lower Unit Gear Set (forward) | 23-96084A4 | 18-2200 |
| 66 | Spring, Retainer, Cross Pin | 24-30893 | 18-2348 |
| 67 | Sliding Clutch | 52-66063 | 18-2202 |
| 68 | Cross Pin, Clutch to Clutch Actuating Shaft | 18-2348 | |
| 69 | Propeller Shaft | 44-66060, 44-66060-3 | 18-2166 |
| 70 | Shim (s) Thrust Ring to Gear Housing | 15-31535A1 | 18-2284 |
| 71 | Lower Unit Gear Set (reverse) | 43-96084A4 | 18-2200 |
| 72 | Thrust Ring, Bearing Carrier | 35915 | 18-3759 |
| 73 | Ball Bearing | 30-88957A1 | 18-1155 |
| 74 | O-Ring | 25-31534 | 18-7159 |
| 75 | Needle Roller Bearing | 31-30956 | 18-1158 |
| 76 | Bearing Carrier Assembly | 73020A14 | 18-2191 |
| 77 | Key, Locating - Bearing Carrier | N/A | |
| 78 | Oil Seals | 26-76868 | 18-2002 |
| 79 | Tab Washer | 14-79447 | 18-2299 |
| 80 | Spanner Nut | 79448 | 18-3751 |
| 81 | Thrust Washer | 13171, 77987 | 18-4220 |
| 82 | Continuity Washer | N/A | |
| 83 | Brass Castle Washer | 12-31211A2 | 18-3714 |
| 84 | Tab Washer | 14-31210, 14-816629 | 18-3200 |
| 85 | Prop Nut | 11-52707 | 18-3700 |
| * | Included in Seal Kit 18-2652 (Not Pictured) |
| N/A | Not Available |
Average Customer Review for Gear Housing/Shift Shaft Oil Seal - 18-2009 - Sierra
Average Customer Review for Water Pump Gasket - 18-2914-9 - Sierra
Average Customer Review for Stainless Steel Shift Shaft - 18-2150 - Sierra
Average Customer Review for Sierra Omc & Merc. Seal - 18-2002 - Sierra
Average Customer Review for Propeller Tab Washer, 10 Pack - 18-3200-9 - Sierra
Average Customer Review for Water Pump Insert Cup - 18-3114 - Sierra
Average Customer Review for Lower Gear Housing Seal Kit - 18-2652 - Sierra
Average Customer Review for Sierra 18-4220 Propeller Thrust Washer
Average Customer Review for Water Pick-Up Insert Screw - 18-3197 - Sierra
Average Customer Review for Shift Shaft Washer - 18-2340-9 - Sierra
Average Customer Review for Mercury/Mercruiser Trim Tab Anode, Zinc - Sierra
Average Customer Review for Water Pump Housing Bushing - 18-3110 - Sierra
Average Customer Review for Sierra 18-3723-9 Stainless Steel Propeller Lock Nut
Average Customer Review for Lower Unit Mounting Screw - 18-2361-9 - Sierra
Average Customer Review for Sierra 18-2244 - Mercury Oil Fill/Drain Plug
Average Customer Review for Brass Propeller Castle Washer - 18-3714 - Sierra
Q:
Is this the enter and outer seals for 90hp 3 cyl?
A:
We will need to know engine model/serial number to confirm.
Q:
Need propeller shaft seal MERCURY pn. 26-98283 1983 25HP?
A:
Unfortunately we do not have a cross reference with that, you will need to contact Mercury.
Q:
Where is the 2nd seal behind this seal backwards? Do I order 2 of these?
A:
Typically these require two seals, but we will need your engine information to verify.
Q:
Is this the shift shaft for the lower unit for an alpha one gen one?
A:
Yes this is for Alpha One, not Gen II outdrives.
Q:
Will this fit my 115 mercury outboard?
A:
We will need to know the serial number and year in order to confirm.
Q:
It fit to my 150 hp force. 1990.?
A:
No this will not. It fits certain Mercury/Mariner motors. You have a retainer part number 819217.
Q:
I am looking for price and availabilty for a replacement bearing carrier. boat: 1976 Webbcraft Mercruiser 888 serial number 4457992. the bearing carrier has a number stamped into it #56211?
A:
We have Part Number 18-2191 made by Sierra that is the Aftermarket version of the number you have provided me. The cost is $85.48 and is available to ship in 3 business days. We do not carry the OEM one at this time.
Q:
Does this come with the seals already installed?
A:
This is housing only. It does not come with seals that you get in purchasing the kit.
Q:
Is this the bearing the shifter housing in type2 lower unit?
A:
This particular one is on the prop shaft. It is part #57 in this exploded view: http://www.iboats.com/Mercruiser-Gen-II-Lower-Gearcase-Assembly-Exploded-View/dm/view_id.272971
Q:
Do these fit Mer 70Hp ser#08275667 can I get just the o-rings?
A:
There are no results with that serial number. Mercury serial numbers typically a letter, ex: 0B275667. Assuming that's what it is then you need part number 18-2375.
Q:
Will these work in a 1975 chrysler 75 75hp model?
A:
Yes it will work for your outboard motor.
Q:
Need a lower unit hydryolic plug for a 75hp Mariner any suggestions?
A:
We will need the serial number of the engine to cross reference the part.
Q:
Does this come with the o-ring gasket?
A:
Yes, the plug and the gasket come together.
Q:
Does this fit a Merc 25XD serial # 6634579?
A:
No you need 18-2375 from Sierra for your motor.
Q:
What is the inner and outer diameter? Our current washer fits the inner but is tight on the outer.?
A:
We cannot match it up by specs, but only engine application. Let us know if you can provide that.
Q:
Does it come with any gaskets o rings to usewhen putting everything back together after install"?
A:
There are gaskets and such if you are replacing the water pump kit. So if you are taking apart the housing and such there are. If you are just replacing impeller then no. This impeller does not come with any other items, just the impeller.
Q:
Hello!Will this impeller fit my 4hp mercury and how about the drive key. Thanks!?
A:
We will need to know the engine serial number to confirm impeller.
Q:
Need a water pump kit for a 2006 150 XL OPT What is P/N?
A:
We will need engine serial number to confirm water pump parts.
Q:
Will this fit 85hp mercury serial#4098055? I believe it's a 74?
A:
Yes this will work for your motor. Also it is a 1975.
Q:
What is dia. of center hole and width of fins?
A:
The dimensions are as follows:
Inner Diameter: 0.875"
Outer Diameter: 2.368"
Height: 1.325"
Q:
Will this fit 135 v6 1989 mercury outboard?
A:
To determine if this will fit the engine we would need the serial number of the engine.
Q:
Is this the right impellor for a 1995 Mercury V-135 outboard?
A:
Yes this impeller will work for your Mercury V-135 1995 as long as your serial number fits the range of 0A904646 THRU 0C100860.
A:
Yes this is the correct impeller for your outboard.
Q:
I have a Force by mercury. 40 hp-1995. oe124358. What impeller?
A:
The impeller for your engine is 18-3057.
Q:
Is this the gasket for the screw where the gear oil goes in the lower unit?
A:
That is right. It is designated for the drain area where the oil enters the lower unit.
Q:
Is this clip for a alpha one gen 2 lower unit?
A:
Yes these are for the Mercruiser Gen II outdrive.
Q:
How do i replace item?
A:
Identify the OEM number and see if it cross references with this part. If you need some assistance give us a call at 1-800-914-1123.
Q:
How do i replace item #2 speedometer tube? Does it just screw into the housing?
A:
This is a prop nut for the propeller not for speedometer pitot tube. Those tubes just install on the stern of your boat with a basic hole pattern and screw it in. If further assistance is needed call us at 1-800-914-1123.
Q:
Will this fit my 115 hp Mercury outboard, SN 1B995769, model 1115F13KD, 2013 mercury 115 4 stroke. If this is not the right prop nut/washer, can you provide the correct part number?
A:
Yes this will work with your application. This is for Mercury 75-300hp 2 and 4-Stroke outboards.
Q:
My new prop is a 1/4 inch to far up the prop shaft. The old prop had no spacer, does this washer make the new prop fit right or do I have the wrong prop?
A:
These tab washers are for keeping prop nut secure. These do not act as spacers or anything. You will need to contact us with your motor and prop number you have for us to look into a possible issue. Call us at the number at the top of the page.
Q:
Is fit for my Mercury 75hp 4 strokes motor?
A:
We will need to know the serial number in order to match up the part.
Q:
Will this fit on a 84 black max 150 hp?
A:
Yes it will, just keep in mind this is zinc.
Q:
Will this trim tab work on a 1981 898?
A:
Yes it will work. You will just need to confirm if the material is what you need. Zinc is for salt water.
Q:
I have a 20 HP mariner Sea Pro Maration. Model number 0B246587. Will this trim tab fit my motor?
A:
No it will not. You need part number 98432.
Q:
Trim tab for my 1986 mariner 150hp?
A:
This will work, but just keep in mind zinc is made for freshwater.
Q:
Will this fit a 35hp mercury - serial number 0B247641 - original anode has 31640-02 stamped on it.?
A:
Yes this will work for your motor. Just make sure zinc is the correct material you need.
Q:
I just purchase a 4 blade prop dia/14.25 pitch/19 it will not clear my trim tab. Do I need to order a smaller trim tab ?
A:
We will need to know motor to see if there is another option for trim tab anode.
Q:
I have a 2001 Mariah with a 5.0 and Alpha One, what rim tab will work for my freshwater application?
A:
The zinc anode is for salt water use. You will want part # 18-6241 or part # CM31640M. These are magnesium and are for fresh water use.
Q:
Will this fit a 2000 mercury 125 hp outboard?
A:
Yes this will work with your Mercury outboard.
Q:
What is the Dia. on the 31640 ?
A:
The measurements are as follows:
Length: 7";
Diameter: 6-1/2";
Width: 6";
Height: 3-1/2"
Q:
Mine is diameter 4" 92 40 2 stroke mercury classic do you have this one?
A:
Serial number is needed to find correct anode. Give us a call at 1-800-914-1123 if you have further questions. http://www.iboats.com/Mercury-Trim-Tab-Anodes-and-Anti-Ventilation-Plate-Anodes/dm/view_id.1104573
Q:
Where are dimensions? 87 Mercruiser 3.0. is 3.5" diameter. What do I order?
A:
Length: 7", Diameter: 6-1/2", Width: 6", Height: 3-1/2". We can only cross reference OEM number so we would need serial number to access parts diagram. This should work if you have the Alpha Outdrive. Contact us at the number at the top of the page and we can look into it further if needed.
Q:
Will this fit a 1997 40hp force outboard product 31640?
A:
Hi Andrew- This Sierra trim tab anode will work for the 1997 40 hp Force outboard engine.
Q:
What do you have to fit a 2003, 50 hp johnson.2 cyl small gear case?
A:
This particular trim tab is best for Honda/Mercury applications. We unfortunately do not currently have anything that will match your Johnson application.
Q:
I have a 1982 mercury 150 black max will this fit?
A:
Yes it will, just keep in mind this is zinc.
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