Reply
 
Thread Tools Search this Thread
 
Old 23 April 2011, 15:20   #1
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
Join Date: Jul 2005
Posts: 12,645
RIBase
WARNING-Gearbox drain fibre washers causing screws to loosen

If you've recently put new fibre washers on after a gear oil change on a Yam,a Mercury or a Mariner, go back and check how tight they are.

I recently did my yearly gear oil change, and found my drain and level plugs rather looser than they should be-still needed a screwdriver to undo them, but much looser than I'd done them up to- and a tiny bit of discolouration to the gear oil.

After a chat with the guy I get all my parts from, it appears that both Yamaha and Merc/Mariner have changed the composition of the gearbox drain fibre washers and they compress much more than the old type. He's been seeing the same thing on a regular basis.

So, I went back after a week and retightened mine after this oil change. Shockingly,I got 1/4 turn on it.
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 is offline   Reply With Quote
Old 24 April 2011, 00:27   #2
Member
 
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
Thanks, Nos; good to know. I'll pass that one around to my boating buddies.

I'm using a reasonably large stash of washers I got a couple of years ago, so will most likely forget by the time I get new ones...

jky
__________________

__________________
jyasaki is offline   Reply With Quote
Old 24 April 2011, 02:25   #3
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
Join Date: Jul 2005
Posts: 12,645
RIBase
No worries.
You can tell the old style washers-they are red, but there's a black line round them if you look at the edge. The new type are entirely red.
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 is offline   Reply With Quote
Old 25 April 2011, 11:07   #4
Member
 
Peter_C's Avatar
 
Country: USA
Boat name: Uh...a kayak?
Length: 4m +
Join Date: Dec 2009
Posts: 1,485
When I was a professional Auto Tech I hated fiber washers and refused to use them, just for the reason that they would come loose (Automotive oil change places use the heck out of them because they are cheap...along with cheap oil filters). Copper works the best, because it has great crush properties (.$$), then aluminum since it is a harder metal. The drain plug gaskets like Toyota uses are a combination of aluminum and fiber and seem to work well.

Fiber washers can also be overtightened easily, causing them to split. There is a happy medium in there, but the recommendation to recheck the torque is probably the best. Thanks for sharing
__________________
Peter_C 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 02:43.


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