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Buckmark311
MMT Pro Member
Joined: Wed Sep 16, 2015 11:50 am
Posts: 284
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 GT Grease screw lower unit went to grease my lower unit yesterday for regular maintence and started backing the screw out. Got 4-5 revolutions nice and easy and then its locking up. I have NEVER had this happen. its always threaded in and out with fingers to prevent cross threading it. What kind of problem do I have on my hands?
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| Mon Jul 08, 2019 12:29 pm |
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bluesky2012
MMT F.E.
Joined: Mon Jul 14, 2014 8:19 am
Posts: 981
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GT Grease screw lower unit Sounds cross threaded to me. If your seals are old, why not just remove the lower and remove the shaft, go ahead and run a tap to clean the threads, then put it together and replace the seals? Kill two birds with one stone.
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| Mon Jul 08, 2019 1:54 pm |
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Buckmark311
MMT Pro Member
Joined: Wed Sep 16, 2015 11:50 am
Posts: 284
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Re: GT Grease screw lower unit shyttttttt... i was hoping that wasn't the case... i'm going to look at it again. I can back it almost all the way out freely and then it locks up. FML
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| Tue Jul 09, 2019 3:24 pm |
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Will
MMT Elite Member
Joined: Fri Jul 08, 2011 1:54 pm
Posts: 8133
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Re: GT Grease screw lower unit Pic? Why not a zerk? Why do you have to unscrew something to grease it?
_________________
Before the internet, the majority of the village idiots stayed in their villages.
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| Tue Jul 09, 2019 4:49 pm |
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Russ
MMT 1000 Club
Joined: Mon Dec 31, 2012 11:07 pm
Posts: 4820
Location: West Monroe, LA
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Re: GT Grease screw lower unit It's a pressure release thing, will
#CFFITR
#GhostBoat
#Whoneedsphysicsihaveamudmotor
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| Tue Jul 09, 2019 5:40 pm |
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Wchauvin
MMT 1000 Club
Joined: Sat Sep 30, 2017 7:10 pm
Posts: 1872
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Re: GT Grease screw lower unit The XD lower units on the gatortail require you to take a screw out to grease it. I forgot one time and blew my seals and it was a hoe to replace lol
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| Tue Jul 09, 2019 6:02 pm |
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Will
MMT Elite Member
Joined: Fri Jul 08, 2011 1:54 pm
Posts: 8133
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Re: GT Grease screw lower unit That's retarded. They should use some kind of check valve or something.
_________________
Before the internet, the majority of the village idiots stayed in their villages.
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| Tue Jul 09, 2019 7:39 pm |
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Wchauvin
MMT 1000 Club
Joined: Sat Sep 30, 2017 7:10 pm
Posts: 1872
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Re: GT Grease screw lower unit I completely agree, I hate it
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| Tue Jul 09, 2019 8:34 pm |
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Buckmark311
MMT Pro Member
Joined: Wed Sep 16, 2015 11:50 am
Posts: 284
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Re: GT Grease screw lower unit well, bearing was shot. dropped a roller that made its way into the housing. scarred up my prop shaft inside the housing. FML. thank god this didn't happen during duck season.
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| Mon Jul 22, 2019 2:11 pm |
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Will
MMT Elite Member
Joined: Fri Jul 08, 2011 1:54 pm
Posts: 8133
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Re: GT Grease screw lower unit
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Before the internet, the majority of the village idiots stayed in their villages.
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| Mon Jul 22, 2019 3:46 pm |
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JIMMY W
MMT 1000 Club
Joined: Tue Jan 13, 2009 8:02 pm
Posts: 4534
Location: South Louisiana
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Re: GT Grease screw lower unit It’s the best way to grease it,Works perfect 
_________________
17/54 GT EXTREME Center Console, Huntdeck w/ GTR 35
Hoyt Mods and some other goodies
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| Wed Jul 24, 2019 12:51 am |
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Buckmark311
MMT Pro Member
Joined: Wed Sep 16, 2015 11:50 am
Posts: 284
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Re: GT Grease screw lower unit good news is that we were able to drill out the old screw and keep the same threads. Now just waiting for the Lower Unit rebuild kit to arrive from GT so I can get back on the water.
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| Wed Jul 24, 2019 10:36 am |
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bluesky2012
MMT F.E.
Joined: Mon Jul 14, 2014 8:19 am
Posts: 981
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Re: GT Grease screw lower unit It’s pretty straightforward and easy. I did mine a few months back. If you need help, plenty on here can walk you through it.
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| Wed Jul 24, 2019 8:37 pm |
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Buckmark311
MMT Pro Member
Joined: Wed Sep 16, 2015 11:50 am
Posts: 284
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Re: GT Grease screw lower unit update... got the LU rebuild kit and looking at the damage on the prop shaft... We initially thought one of the rollers on the bearing broke free and caused the damage. after wiping all the grease off (and seeing all the rollers in tact) we noticed the inner race on the bearing toward the prop CRACKED!
What could cause this to happen? Just a bad race? I'm running a lvl 2 modded GT. I ran a huge prop for about 20 hours (hill marine 12.5x12p tulip). could all that extra prop pushed by the extra HP have put that much torque on the shaft to crack the race? We are baffled as to how this could have happened.
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| Thu Aug 01, 2019 12:57 pm |
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Will
MMT Elite Member
Joined: Fri Jul 08, 2011 1:54 pm
Posts: 8133
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Re: GT Grease screw lower unit Could have been a manufacture defect in the race.
_________________
Before the internet, the majority of the village idiots stayed in their villages.
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| Thu Aug 01, 2019 1:09 pm |
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ted b
MMT Member
Joined: Sat Jun 30, 2018 8:59 pm
Posts: 7
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Re: GT Grease screw lower unit Or not races are designed to be the week link. It’s just cost of effective in man hrs and parts to rebuild. Unfortunately we deal with this at work all the time
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| Fri Aug 02, 2019 7:05 pm |
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