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sort of OT - Yamaha lower unit gear oil pump
Legobusier	#1  Posted on 10/15/20 - 6:36 AM
Member Posts: 8 Comments: 0 Joined: 09/17/20	Hi all, As the new owner of a Yamaha 70 2-stroke, I'm starting to prepare for winter storage and have a question. Does anyone know the thread size/pitch of the lower unit fill hole for the gear oil? I have a pump from my previous boat/engine (Honda 90 4-stroke) and am wondering if the same pump will fit on the Yamaha....I know...I can just take it apart and try it, but I'm not able to do that right now :) Thanks, all....
biggiefl	#2  Posted on 10/15/20 - 8:16 AM
Member Posts: 890 Comments: 4 Joined: 05/08/06	They are universal as far as I know. I have used the same pump on OMC, Merc, Suzuki, & Yamaha....I doubt Honda would change things up. 24 Whalers so far....
Legobusier	#3  Posted on 10/15/20 - 8:56 AM
Member Posts: 8 Comments: 0 Joined: 09/17/20	biggiefl wrote: They are universal as far as I know. I have used the same pump on OMC, Merc, Suzuki, & Yamaha....I doubt Honda would change things up. Thanks...for some reason I thought they were brand specific...perhaps I just made that up.. :)
tedious	#4  Posted on 10/16/20 - 4:34 AM
Member Personal Page Posts: 1072 Comments: 2 Joined: 09/07/08	There are two different sizes. The pump we have has an adapter that you screw on to fit some brands. Sorry, I don't remember whether Yamaha and Honda are the same. Looks like WallyWorld sells one that covers the different sizes: https://www.walmart.com/ip/Lower-Unit...RsQAvD_BwE