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Model:

Model

Serial Number

Sierra Gimbal Bearing

IA 1684186 - 2062140 18-2101
IB 1684633 - 2062140 18-2101
IC 1685240 - 2065189 18-2101
II 1602186 - 2278488 18-2101
II 2398798 - 2671321 18-2101
120 2062141 - 2791956 18-2101
120 (1)2791957 - 4893634 18-2101
120 (2)2791957 - 4893634 18-2100
140 2062141 - 2791956 18-2101
140 (1)2791957 - 4893634 18-2101
140 (2)2791957 - 4893634 18-2100
160 2065190 - 2763441 18-2101
165 (1)2763442 - 4890459 18-2101
165 (2)2763442 - 4890459 18-2100
165 4890460 - UP 18-2100
225S 3856268 - 4200499 18-2100
228 4782330 - UP 18-2100
233 4200500 - UP 18-2100
250 4791300 - UP 18-2100
470 4208730 - UP 18-2100
888 (1)3106717 - UP 18-2101
888 (2)3106717 - UP 18-2100
898 4782330 - UP 18-2100
ALL #1 + ALPHA 4893635 - UP 18-2100
Bravo All 18-2100

Model

Serial Number

Sierra Gimbal Bearing

Notes:
  • (1) : Without Gimbal Trim Sender
  • (2) : With Gimbal Trim Sender
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Price: $40.07
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Part # 18-2100
2nd Day Air for $2 More Eligible
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Price: $99.18
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Part # 18-2101
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Part # 18-21005
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Mallory Bearing, Gimbal 9-72411
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Part # 9-72411
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Price: $49.33
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Part # 18-21001
2nd Day Air for $2 More Eligible
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Part # 18-21006
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Part # 18-73131
2nd Day Air for $2 More Eligible
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Part # 879194A01
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Sierra

Gimbal Bearing Removal and Replacement (Video)

A video demonstration of the removal and replacement of a gimbal bearing on a Mercruiser Alpha Gen 2 Drive assembly. This procedure is similar with other brands of outdrives as well. ... read more



Welcome to Mallory Marine. We’re going to demonstrate the removal and replacement of a gimbal bearing on a Mercruiser Alpha Gen 2 drive assembly. This procedure is similar with other brands of outdrives as well.

Step 1 - Place the outdrive in forward gear.

Step 2 - Make sure the drive is in the down position and as vertical as possible.

Step 3 - Remove the outdrive. Remove the trim rams, the nuts holding the drive, and the speedometer pick up tube.

Step 4 - It is always a good idea to check the engine alignment prior to removing the bearing.

Step 5 – Remove the gimbal bearing using the Mallory Marine puller. Part number 9-79820. Follow the enclosed instructions for an easy removal. For a more detailed video on the puller itself, visit Mallory Marine’s website, or YouTube.com.

Step 6 – Install the bearing. Mark the outside face of the carrier to index the grease hole in the side of the carrier making sure the tolerance ring does not obstruct the grease hole. Using the proper mandrel tool, drive the bearing in place making sure you have aligned the mark previously made with the grease port in the transom housing.

Step 7 – Grease bearing. Locate the grease nipple on the right hand lower transom housing and pump grease into the gimbal bearing until you see it coming up around the bearing.

Step 8 – Check engine alignment. Install the engine alignment tool again making sure the alignment is correct. You should be able to turn the tool with two fingers when properly aligned.

Step 9 – Preparing drive for installation. Install “O” ring on yoke shaft and grease spline with spline grease. Install gasket and water passageway “O” ring. Grease shift slide making sure it is properly aligned. Grease u-joint assembly if equipped with greasable u-joints.

Step 10 – Install outdrive. Align yoke shaft through gimbal bearing and into engine coupler. Make sure drive is in forward gear by only pressure on propeller and pushing drive into place. Install retaining nuts, trim rams and speedometer hose.

Thank you for viewing. For further information and parts go to iboat.com.

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Average Customer Review for Sierra 18-2100 Gimbal Bearing
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Based On 15 Reviews | Write Review
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Everything i ordered from iboats was exactly what i needed. Thank you!!!
by Elaine from Clintonville, Wisconsin on May 30, 2016
Geart place to do business
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Perfect fit!
by Anthony from Branford, Florida on July 22, 2015
This bearing fits perfect in my Volvo DP-SM Drive. Used these several times now and never have a problem.
(1 of 1 people found this review helpful)
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gimbal bearing
by Alan from Pembina, North Dakota on February 25, 2015
fit great, no installation issues
(1 of 1 people found this review helpful)
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good deal!
by Jaime from Nassau, New York on August 06, 2014
great product
(1 of 1 people found this review helpful)
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lube
by Kenneth from Penhook, Virginia on June 17, 2014
I have put 2 of these in my Volvo, They last one season. I cannot see how you can lube them.
(1 of 4 people found this review helpful)
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Mercruiser v6 gimbal bearing
by Cynthia from Bartlett, Tennessee on June 10, 2014
If when running you hear a grinding sound, check this bearing. Also while you have outdrive apart check your bellows to make sure no cracks.
(1 of 2 people found this review helpful)
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1988 OMC King Cobra gimbal bearing
by David from North Liberty, Iowa on July 19, 2012
The gimbal bearing fit fine. Removal was a little more challenging. Went to Autozone and got a loaner bearing puller and slide hammer which worked well. An alignment tool is necessary to loosen the new bearing and properly align the shaft. The Sierra gasket set gets a thumbs down for the gimbal bearing 'o' rings that go on the shaft. They were slightly over sized and made installation of the outdrive impossible. Bought an OEM gasket kit and installed with 'o' rings with oil as shown in manual and had no problems replacing drive with one person and no hoist.
(1 of 1 people found this review helpful)
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Made on Friday at 4:00pm
by Jeff from Eden Prairie, Minnesota on April 26, 2012
well someones having a bad day or bad week or bad month, I have ordered and returned 2 of these in a row because of poor manufacturing, bearing is off center, and misaligned, apparently who ever is stamping these out, is allowed to drink beer on lunch hour, Or Sierra has no quality control program. ON both bearings I received it is so misaligned you can see it plain as day one side of the insert is about 0.1 inches offset from the other side. In other words if you spin it around it will wobble about 0.100 inches,
(0 of 2 people found this review helpful)
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owner
by Carroll from Butte, Montana on October 23, 2011
worked fine once it was lined up.
(2 of 2 people found this review helpful)
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Parts order
by Thomas from Kuttawa, Kentucky on October 17, 2011
Received just what was ordered on a timely manner, thank you.
(1 of 1 people found this review helpful)
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Parts order
by Thomas from Kuttawa, Kentucky on October 17, 2011
Received just what was ordered in a timely manner, thank you.
(1 of 1 people found this review helpful)
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great deal
by Bruce from Lehi, Utah on September 19, 2011
perfect fit. great deal
(1 of 1 people found this review helpful)
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The Great Sierra Gimbal Bearing
by Jeffrey from Davenport, Iowa on August 01, 2011
This product has givin me a better life. Thanks to the Sierra company for providing the boating world with reasonably priced high quality marine parts. Jeff
(1 of 1 people found this review helpful)
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Fast Delivery
by Ivan from Miramichi, New Brunswick on July 10, 2011
Part was exactly as expected
(1 of 1 people found this review helpful)
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quality bearing
by Bryan from Big Lake, Minnesota on April 17, 2011
Matched up to the one I took out of my alpha one, went in with no issues. Just remember to have a decent slide hammer or removal tool as the old one came out hard. There is also a seal behind this bearing you may want to replace at the same time. iboats rocks, shipping is very fast. Ordered on a Wednesday and delivered here in Minnesota on Friday with standard shipping.
(11 of 11 people found this review helpful)
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gimbal bearing
by Robert from San Antonio, Texas on May 31, 2012
After many emails to see which bearing I needed and then ordering the one Iboats suggested, I took my boat apart to find out it was the wrong one. The bearing seams like a well made part but I just couldn't use it.
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Q:
DIFFERENCE BETWEEN BEARING 18-2100 AND BEARING 18-21001?
A:
18-2100 is greasable and the 18-21001 is non-greasable. They will work with different engines as well. We will need to know your application to see if it will work for you.


Q:
My boats a 1997 apha one is this the right bearing,350 enegine,on a Rinker boat?
A:
This will not work for your Alpha One. You will need 18-21001.


Q:
In what country is this part (18-21005) manufactured?
A:
This part is manufactured in the USA.


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