Reply
 
Thread Tools Search this Thread
 
Old 17 December 2013, 06:52   #1
Member
 
HughN's Avatar
 
Country: UK - England
Town: Littlehampton, W Sx
Length: no boat
MMSI: 235101591
Join Date: Jan 2012
Posts: 732
Mariner (Yamaha) 30 Lower Unit

This follows on from the thread about water in the lower-unit: could I do some more brain-picking please?

The driveshaft seal does look pretty knackered.



Which way should I be undoing the gear selector connector? Winding it downwards it hits the jam-nut; winding it upwards it comes to a halt.



The bits that really stink of gear oil are the small ports on either side of the lower unit. I thought these were to do with the exhaust, so I'm not too sure how gear-oil might end up there? (Those on the other side are worse in terms of brown residue)



This had a head-rebuild, new impeller, etc., 18 months ago. And 'yes' it could do with a re-paint.

Thank you,

Hugh
__________________

__________________
"Can ye model it? For if ye can, ye understand it, and if ye canna, ye dinna!" - Lord kelvin
HughN is offline   Reply With Quote
Old 17 December 2013, 09:15   #2
RIBnet supporter
 
bartiny's Avatar
 
Country: UK - England
Town: Accrington
Length: no boat
Join Date: Oct 2012
Posts: 451
When I removed my gearbox to change impeller I selected reverse gear just cracked the lower lock nut so that when I refit it would be set right then undid the long nut until it detatched very easy and no refit problems.


Click image for larger version

Name:	gear selector 001.jpg
Views:	107
Size:	92.8 KB
ID:	88399


Click image for larger version

Name:	gear selector 002.jpg
Views:	104
Size:	90.6 KB
ID:	88400

HTH
__________________

__________________
bartiny is offline   Reply With Quote
Old 17 December 2013, 09:33   #3
RIBnet supporter
 
bartiny's Avatar
 
Country: UK - England
Town: Accrington
Length: no boat
Join Date: Oct 2012
Posts: 451
Sorry should have said that both pictures show selector in reverse gear position
__________________
bartiny is offline   Reply With Quote
Old 17 December 2013, 09:37   #4
Member
 
HughN's Avatar
 
Country: UK - England
Town: Littlehampton, W Sx
Length: no boat
MMSI: 235101591
Join Date: Jan 2012
Posts: 732
Thanks.
__________________
"Can ye model it? For if ye can, ye understand it, and if ye canna, ye dinna!" - Lord kelvin
HughN is offline   Reply With Quote
Old 17 December 2013, 10:20   #5
Member
 
biffer's Avatar
 
Country: UK - England
Town: swanwick/hamble
Boat name: stormchaser
Make: custom rib
Length: 8m +
Engine: inboard/diesel
Join Date: Aug 2007
Posts: 3,848
I think I have a gearbox somewhere. There is a chunk missing out of the trim plate but the rest is there
__________________
biffer is offline   Reply With Quote
Old 19 December 2013, 08:36   #6
Member
 
HughN's Avatar
 
Country: UK - England
Town: Littlehampton, W Sx
Length: no boat
MMSI: 235101591
Join Date: Jan 2012
Posts: 732
A pressure test showed the leak to be through the bellows on the shift-linkage - a minor seal, but important none-the-less...
__________________

__________________
"Can ye model it? For if ye can, ye understand it, and if ye canna, ye dinna!" - Lord kelvin
HughN is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 15:53.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.