Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 23-04-2015, 17:34   #1
Registered User
 
zboss's Avatar

Join Date: Sep 2011
Location: On a boat
Boat: Cabo Rico 38
Posts: 3,597
Why fill gear case from bottom

Folks,

Why do you need to fill the gear case oil from the bottom hole (yamaha)? It makes an awful mess and you end up leaking out some of the oil....

- z
__________________

zboss is offline   Reply With Quote
Old 23-04-2015, 17:38   #2
Registered User
 
leftbrainstuff's Avatar

Join Date: May 2011
Location: San Francisco and Australia
Boat: Liberty 458
Posts: 2,034
Re: Why fill gear case from bottom

Yamaha 2 stroke outboard I assume.

To purge the air. The holes are so small you cant fill from the top fast enough and cold gear oil is very viscous.

I use a 1 quart plastic bottle with a pvc tube and tapered plug. Works a treat. No mess no fuss. Having the oil nice and warm helps too.

Sent from my SM-N900T using Cruisers Sailing Forum mobile app
__________________

leftbrainstuff is offline   Reply With Quote
Old 23-04-2015, 17:40   #3
Registered User
 
zboss's Avatar

Join Date: Sep 2011
Location: On a boat
Boat: Cabo Rico 38
Posts: 3,597
Re: Why fill gear case from bottom

Quote:
Originally Posted by leftbrainstuff View Post
Yamaha 2 stroke outboard I assume.

To purge the air. The holes are so small you cant fill from the top fast enough and cold gear oil is very viscous.

I use a 1 quart plastic bottle with a pvc tube and tapered plug. Works a treat. No mess no fuss. Having the oil nice and warm helps too.

Sent from my SM-N900T using Cruisers Sailing Forum mobile app
Yes, we use the recommended yamaha pump assembly but you still need to take the pump out and put in the plug, during which some oil leaks out.
zboss is offline   Reply With Quote
Old 03-05-2015, 10:01   #4
Registered User

Join Date: May 2015
Location: Muskegon, Mi
Boat: Columbia 36
Posts: 189
Re: Why fill gear case from bottom

The oil is so thick it will trap air in the case and not be full. You fill from the bottom til it squirts ou the top. If you put the top plug back in before pulling the pump off, that will airlock the case and very little will come out the bottom hole. Or you can turn the motor on its side or almost upside-down before disconnecting. That might not be good for a 4 stroke, but a 2 stroke won't care.
capt jgw is offline   Reply With Quote
Old 03-05-2015, 14:35   #5
Registered User
 
rwidman's Avatar

Join Date: Feb 2008
Location: North Charleston, SC
Boat: Camano Troll
Posts: 4,669
Re: Why fill gear case from bottom

Quote:
Originally Posted by capt jgw View Post
............. If you put the top plug back in before pulling the pump off, that will airlock the case and very little will come out the bottom hole. Or you can turn the motor on its side or almost upside-down before disconnecting.
Of course.
__________________
Ron
HIGH COTTON
Sent from my laptop using Windows 7
rwidman is offline   Reply With Quote
Old 03-05-2015, 15:40   #6
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 18,479
Re: Why fill gear case from bottom

Quote:
Originally Posted by zboss View Post
Yes, we use the recommended yamaha pump assembly but you still need to take the pump out and put in the plug, during which some oil leaks out.

After your sure it's full, put the plug in the top BEFORE you remove the hose from the bottom, you'' be surprised at how little leaks out that way.


Sent from my iPad using Cruisers Sailing Forum
a64pilot is offline   Reply With Quote
Old 04-05-2015, 06:51   #7
Registered User
 
zboss's Avatar

Join Date: Sep 2011
Location: On a boat
Boat: Cabo Rico 38
Posts: 3,597
Re: Why fill gear case from bottom

Quote:
Originally Posted by a64pilot View Post
After your sure it's full, put the plug in the top BEFORE you remove the hose from the bottom, you'' be surprised at how little leaks out that way.


Sent from my iPad using Cruisers Sailing Forum
Yes, that is what we do.
__________________

zboss is offline   Reply With Quote
Reply

Tags
gear

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale: Dry Case Waterproof Phone, Camera & MP3 Case - NEW off-the-grid Classifieds Archive 2 11-07-2012 14:58
Yanmar Gear Case Cover Removal Telekitr Engines and Propulsion Systems 1 15-11-2011 04:54
Hole in Gear Case of My Yanmar quartersplash Engines and Propulsion Systems 1 23-01-2011 22:29
Stripped Oil Vent Screw - Metal Filings in Gear Case - Help! OrangeCrush Propellers & Drive Systems 29 28-12-2009 11:49
Best Solvent to Flush Filings Out of Gear Case? OrangeCrush Engines and Propulsion Systems 1 27-12-2009 18:29



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 03:51.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.