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11Bravo
MMT Pro Member
Joined: Fri Jun 22, 2012 6:48 pm
Posts: 180
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 PD lower unit question While getting my LU ready for the 3 piece seal I got to thinking. The question is how else can water enter the LU?
Mine is not cracked and I'm changing the seal but when running the boat I do see water hit the vinyl cover covering the clutch. It might be me backing off the throttle or another boats wake hitting me while drifting for Fluke. There must be a seal on the upper end under the clutch. My 36 PD is a 2007 with low hours and manual reverse.
Thanks much for any thoughts,
Old Wayne
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| Wed Jul 10, 2013 7:45 am |
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Will
MMT Elite Member
Joined: Fri Jul 08, 2011 1:54 pm
Posts: 8133
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Re: PD lower unit question Yep, there's a seal in the upper end and if I'm not mistaken your motor has a vent in the top of the upper shaft. They discovered it's not needed and you can plug it.
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Before the internet, the majority of the village idiots stayed in their villages.
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| Wed Jul 10, 2013 7:50 am |
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11Bravo
MMT Pro Member
Joined: Fri Jun 22, 2012 6:48 pm
Posts: 180
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Re: PD lower unit question
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| Wed Jul 10, 2013 11:09 am |
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naj
MMT 1000 Club
Joined: Fri Jan 22, 2010 8:40 pm
Posts: 1620
Location: Larose, Louisiana
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Re: PD lower unit question You have to pull the power head off of the lower unit to see that vent. And yes on your year motor you have it. And yes water can get in there especially on short shaft units.
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18' X 48" Center Console Sportsman Fab with a Yamaha F70LA
18' X 48" Center Console Sportsman Fab Dragging a 36hp ProDrive
15' X 42" Sea Arch with a 27hp ProDrive
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| Wed Jul 10, 2013 11:14 am |
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banded-mallard
MMT 1000 Club
Joined: Wed Oct 07, 2009 8:18 pm
Posts: 4310
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Re: PD lower unit question Mine is an 07'. When I pulled my power head to do a little work, I had a bolt looking thing in mine.
IMG_1892.JPG
IMG_1893.JPG
IMG_1894.JPG
When I seperated the lower unit from the power head, this fell out. Like Will mentioned, it was a vent of some sort. I didn't install it back, because it really didn't connect to anything. Nor did I notice a vent hole on the lower unit to plug up. So far so good, I guess if I start noticing water of wartered grease near my clutch, I'll know it was meant for something.
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| Wed Jul 10, 2013 11:22 am |
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naj
MMT 1000 Club
Joined: Fri Jan 22, 2010 8:40 pm
Posts: 1620
Location: Larose, Louisiana
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Re: PD lower unit question Bart at FSE said I could remove it. Still haven't yet. Mine is a rubber hose about 4 inches.
_________________
18' X 48" Center Console Sportsman Fab with a Yamaha F70LA
18' X 48" Center Console Sportsman Fab Dragging a 36hp ProDrive
15' X 42" Sea Arch with a 27hp ProDrive
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| Wed Jul 10, 2013 12:53 pm |
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Will
MMT Elite Member
Joined: Fri Jul 08, 2011 1:54 pm
Posts: 8133
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Re: PD lower unit question Heres one with the rubber hose sticking out the topImageUploadedByTapatalk1373484905.780955.jpg
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Before the internet, the majority of the village idiots stayed in their villages.
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| Wed Jul 10, 2013 1:35 pm |
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