TRS lower unit
07-25-2019, 06:40 PM
#1
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TRS lower unit
Hey guys i just got my dads 1985 Scarab II with twin 454's and TRS outdrives. Its been sitting for a long time in storage and after he passed I went to go get the boat and once home I realized someone tried to remove the lower units gears most likely for scrap money. Which then led us to look at one of the lower units cases and noticed one has a huge crack in it. Not sure how long the crack has been on the boat but are these ok to try and weld or is it better to just try and find a new lower case to swap on. I know cast aluminum can be tricky and i'm sure these need to be pretty precise to work and not get vibrations. Ill post up pics tonight when i get home. Thanks for an help in advance!
07-25-2019, 08:17 PM
#2
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iTrader: (2)
New lower housing is a grand, I think there are a few a round.
I have this listed in classifieds if interested
.https://www.offshoreonly.com/classif...ew-o75126.html
I have this listed in classifieds if interested
.https://www.offshoreonly.com/classif...ew-o75126.html
07-25-2019, 11:13 PM
#3
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Well I’ve been trying to post the picture but I don’t have 10 posts yet so it won’t let me. But yea I’ve been seeing new casings with no internals for a 1K and it’s hard to believe something this old is still a high commodity. I mean I get it it worked and worked well but 30 years later they are this expensive!?
07-25-2019, 11:20 PM
#4
Platinum Member
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You will be better off getting a good used outdrive than trying to repair a 40 yo case. Which side do you need? Which rotation? Also its important to know what transmission you have as the outdrive have different input yokes. More than likely you have B/W transmissions so your input yoke will be a external splines
07-26-2019, 08:27 AM
#5
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Yea I have been trying to find used ones but those are hard to come by too. It’s the right side and I’ve been trying to figure out how to know what rotation and what not. Is there a serial number on it that tells me? It’s been all painted black at some point in its life so I’m sure I’ll have to go scraping paint to get to it.
07-26-2019, 08:30 AM
#6
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Also I have all the gears and bearing from the unit. Who ever tried to steal it didn’t know how to actually get it out once they removed that big brass nut I’ll call it that holds it all in. So would I still need the specific right or left and rotation if I only need a non cracked lower case? Like can I just swap the internals over?
07-26-2019, 09:59 AM
#7
Platinum Member
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You could swap the parts over but you still need to setup backlash and preload. The end of the propshaft will usually say RH or LH. You will have to pull that outdrive off no matter what. Its easy. Just six nuts using a 3/4" socket and the trim ram nuts. When you say they removed the big brass nut are you talking about the prop shaft nut or the bearing retainer. Usually you have to have a bearing retainer wrench to get that off. You need 10 posts to post pictures. Just write 6 more posts with BS so you can get to 10
07-26-2019, 10:02 AM
#8
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