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Zerc, zerk fitting for 25hp Yamaha?

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    Posted: June-23-2018 at 6:46pm
Based on a fair amount of experience with Yamaha stuff with grease fittings, it's about 99.9% sure to be 6 mm.

Just think Ya-Ma-Ha     Ja-Pa-Nese     metric whether it's put together in Japan or any other country that they have plants.
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Dziadzi View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dziadzi Quote  Post ReplyReply Direct Link To This Post Posted: June-23-2018 at 5:29pm
Thanks for that website, Duane..........I am going to try the metric. Good catch!
Frank
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Duane in Indy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Duane in Indy Quote  Post ReplyReply Direct Link To This Post Posted: June-23-2018 at 5:28pm
Originally posted by Dziadzi Dziadzi wrote:

The difference in the threads is indistinguishable to my eyes.


If thats the case then either one will probably go in
Metric is .039 pitch
Sae is .036 pitch
Metric .236 dia
Sae .250 dia

Basically take your pick and see which one screws in the best.
Keep it as original as YOU want it
        1978 Mustang (modified)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Duane in Indy Quote  Post ReplyReply Direct Link To This Post Posted: June-23-2018 at 5:23pm
take one of the other ones out and compare it to new ones
Keep it as original as YOU want it
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dziadzi Quote  Post ReplyReply Direct Link To This Post Posted: June-23-2018 at 5:22pm
The difference in the threads is indistinguishable to my eyes.
Frank
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Duane in Indy Quote  Post ReplyReply Direct Link To This Post Posted: June-23-2018 at 5:21pm
Keep it as original as YOU want it
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dziadzi Quote  Post ReplyReply Direct Link To This Post Posted: June-23-2018 at 5:19pm
Thanks, Duane. May I ask where it says that?
Frank
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Duane in Indy Quote  Post ReplyReply Direct Link To This Post Posted: June-23-2018 at 5:17pm
I think you are going to have to remove the broken one before you install the new one. Maybe you could look at it then and decide which one to use.
Yamaha site may show where it is but I think you would be lucky if they gave any info on sizes.
Keep it as original as YOU want it
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dziadzi Quote  Post ReplyReply Direct Link To This Post Posted: June-23-2018 at 5:12pm
I have been to the Yamaha website. No information about that topic.
Frank
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Duane in Indy Quote  Post ReplyReply Direct Link To This Post Posted: June-23-2018 at 5:09pm
The internut says it's a metric   M6x1.0
Keep it as original as YOU want it
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dziadzi Quote  Post ReplyReply Direct Link To This Post Posted: June-23-2018 at 5:08pm
Both the metric and SAE look similar. I wish it were that easy. I just would like to know if Yamaha used metric or SAE fittings.

Thanks
Frank
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: June-23-2018 at 4:55pm
Originally posted by Duane in Indy Duane in Indy wrote:

To add more confusion it could be 1/16 npt.
Get the old one out and compare it to your stash.

Or find a Yamaha outboard web site.


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Keep it original, Pete
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Duane in Indy Quote  Post ReplyReply Direct Link To This Post Posted: June-23-2018 at 4:46pm
To add more confusion it could be 1/16 npt.
Get the old one out and compare it to your stash.
Keep it as original as YOU want it
        1978 Mustang (modified)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dziadzi Quote  Post ReplyReply Direct Link To This Post Posted: June-23-2018 at 1:13pm
While using my new grease gun to infuse grease into my F25 Yamaha outboard, I somehow broke off the zerc (zerk) fitting that is attached to the tiller. i bought an "Ezee out" to remove the broken off fitting, however, I don't know if the replacement should be an SAE "1/4"--28" fitting or a "metric 6mm" fitting. Sure, I can buy one on ebay for almost $10 (including shipping), but I have dozens of both the SAE and the metric fitting that I already own. I would appreciate hearing from anyone as to which fitting I need to use.......SAE or Metric.?
Frank
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