Gimble bearing
#42
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Sierra's GB for 1997 and back for Merc is 18-2100 and you can put them either way ( backwards).
Next 1998 and up Merc takes GB 18- 21005 and do not put this one in backwards - the inner portion end is a tad shorter on the end - it shaved down compared to the older GB - I think around .030 This needs to be facing out when you install it. Both of these GB are greaseable.
Sierra 18-21001 is the non greaseable (just like merc one) for anything 1997 & back. Merc started non greaseable GB in 2008 and so did Volvo penta in late 2007. FYI.
next for 1998 and up - alpha's Gen II, Bravo, X / XR / XZ - Sierra really recommends 18-21006 - this is a non greaseable GB. if I recall correctly Sierra's GB is Link Belt or GKN currently - I forgot. Mallory Marine carries the SKF - GB inwhich is good also.
Next 1998 and up Merc takes GB 18- 21005 and do not put this one in backwards - the inner portion end is a tad shorter on the end - it shaved down compared to the older GB - I think around .030 This needs to be facing out when you install it. Both of these GB are greaseable.
Sierra 18-21001 is the non greaseable (just like merc one) for anything 1997 & back. Merc started non greaseable GB in 2008 and so did Volvo penta in late 2007. FYI.
next for 1998 and up - alpha's Gen II, Bravo, X / XR / XZ - Sierra really recommends 18-21006 - this is a non greaseable GB. if I recall correctly Sierra's GB is Link Belt or GKN currently - I forgot. Mallory Marine carries the SKF - GB inwhich is good also.
Last edited by BUP; 03-20-2013 at 08:54 PM.
#43
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Sierra's GB for 1997 and back for Merc is 18-2100 and you can put them either way ( backwards).
Next 1998 and up Merc takes GB 18- 21005 and do not put this one in backwards - the inner portion end is a tad shorter on the end - it shaved down compared to the older GB - I think around .030 This needs to be facing out when you install it. Both of these GB are greaseable.
Sierra 18-21001 is the non greaseable (just like merc one) for anything 1997 & back. Merc started non greaseable GB in 2008 and so did Volvo penta in late 2007. FYI.
next for 1998 and up - alpha's Gen II, Bravo, X / XR / XZ - Sierra really recommends 18-21006 - this is a non greaseable GB. if I recall correctly Sierra's GB is Link Belt or GKN currently - I forgot. Mallory Marine carries the SKF - GB inwhich is good also.
Next 1998 and up Merc takes GB 18- 21005 and do not put this one in backwards - the inner portion end is a tad shorter on the end - it shaved down compared to the older GB - I think around .030 This needs to be facing out when you install it. Both of these GB are greaseable.
Sierra 18-21001 is the non greaseable (just like merc one) for anything 1997 & back. Merc started non greaseable GB in 2008 and so did Volvo penta in late 2007. FYI.
next for 1998 and up - alpha's Gen II, Bravo, X / XR / XZ - Sierra really recommends 18-21006 - this is a non greaseable GB. if I recall correctly Sierra's GB is Link Belt or GKN currently - I forgot. Mallory Marine carries the SKF - GB inwhich is good also.
#44
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Sierra's GB for 1997 and back for Merc is 18-2100 and you can put them either way ( backwards).
Next 1998 and up Merc takes GB 18- 21005 and do not put this one in backwards - the inner portion end is a tad shorter on the end - it shaved down compared to the older GB - I think around .030 This needs to be facing out when you install it. Both of these GB are greaseable.
Sierra 18-21001 is the non greaseable (just like merc one) for anything 1997 & back. Merc started non greaseable GB in 2008 and so did Volvo penta in late 2007. FYI.
next for 1998 and up - alpha's Gen II, Bravo, X / XR / XZ - Sierra really recommends 18-21006 - this is a non greaseable GB. if I recall correctly Sierra's GB is Link Belt or GKN currently - I forgot. Mallory Marine carries the SKF - GB inwhich is good also.
Next 1998 and up Merc takes GB 18- 21005 and do not put this one in backwards - the inner portion end is a tad shorter on the end - it shaved down compared to the older GB - I think around .030 This needs to be facing out when you install it. Both of these GB are greaseable.
Sierra 18-21001 is the non greaseable (just like merc one) for anything 1997 & back. Merc started non greaseable GB in 2008 and so did Volvo penta in late 2007. FYI.
next for 1998 and up - alpha's Gen II, Bravo, X / XR / XZ - Sierra really recommends 18-21006 - this is a non greaseable GB. if I recall correctly Sierra's GB is Link Belt or GKN currently - I forgot. Mallory Marine carries the SKF - GB inwhich is good also.
#45
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iTrader: (9)
there is a reason for the shorter inner and as why it needs to face outward. These GB are different by design by load and the shorten end is for cleanance as to when trimmed fully & full left to right turns not to produce a slight noise. This applies to 1998 and up models from Merc.
the 1997 and back GB the input driveshaft has this clearance already plus the load is different on the bearing than 1998 and up.
We have probably installed 1000 + GB over a course of 24 years. Nobody ever pulls their drive to completely check the condition of the U-joint bellows until after the leak and the deep growl by the GB from water intrusion that has already taken place or the boat owner left the drain plug in during rain storms. Shift cable bellows is a another story just the same but alot easier to check but still nobody checks that either - not to change the subject here.
2001 boat uses 18- 21005 not 18-2100 both greaseable. You can call Sierra on this if by chance anyone thinks i do not know what I'm talking about, no offense on my end. You have to install this bearing 18-21005 correctly. Also you can call mallory Marine and Merc to verify what I'm talking about. We attend all the OEM marine schools and take all the tests and we are very current all the way up to the catalyst systems in these marine motors. FYI & Good luck.
the 1997 and back GB the input driveshaft has this clearance already plus the load is different on the bearing than 1998 and up.
We have probably installed 1000 + GB over a course of 24 years. Nobody ever pulls their drive to completely check the condition of the U-joint bellows until after the leak and the deep growl by the GB from water intrusion that has already taken place or the boat owner left the drain plug in during rain storms. Shift cable bellows is a another story just the same but alot easier to check but still nobody checks that either - not to change the subject here.
2001 boat uses 18- 21005 not 18-2100 both greaseable. You can call Sierra on this if by chance anyone thinks i do not know what I'm talking about, no offense on my end. You have to install this bearing 18-21005 correctly. Also you can call mallory Marine and Merc to verify what I'm talking about. We attend all the OEM marine schools and take all the tests and we are very current all the way up to the catalyst systems in these marine motors. FYI & Good luck.
Last edited by BUP; 03-20-2013 at 10:02 PM.
#47
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Forget all that installing backwards crap just because its easier. If im going to take the time to remove my drive and check everything out, Im putting a whole new bearing in with new race. Just my 02 cents.
#48
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I haven't made up my mind which one I'm going to use yet.
Last edited by vindicator101; 03-21-2013 at 09:15 AM.
#49
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What about the seal I see in the parts fiche? Does that also get changed when changing the gimbal bearing? When pulling the bearing out with a puller, does the seal come out with it? How about the bearing carrier, does that come out with the bearing or stay in? Thanks.
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What about the seal I see in the parts fiche? Does that also get changed when changing the gimbal bearing? When pulling the bearing out with a puller, does the seal come out with it? How about the bearing carrier, does that come out with the bearing or stay in? Thanks.
If it looks like this pic then you will have to use a puller and both the bearing and carrier will come out together.
Thank "seafordguy" for the pics. He helped me out.