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Old 10 January 2013, 09:40   #1
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Yamaha 5hp Reed Valve (1980s)
Wanted 5hp Reed Valve for a 1980s Yamaha 2 stroke outboard. It has the blue casing with stripes which I think is mid to late 80s.
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Old 12 January 2013, 20:22   #2
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I have an old yamaha 5hp powerhead, I have no idea if its the same but is the same vitage as this Mariner.

Scrapping Yamaha/Mariner 4/5hp 2 stroke outboard engines | eBay

pm me if you think it might work.

edit - just checked it and its a 4HP, think they are the same but let me know.
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Old 13 January 2013, 14:16   #3
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A few pics of my old engine



the serial number



Pics of the reed block





I have no idea if it is compatible but maybe others may, let me know if of any use to you.
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Old 13 January 2013, 14:44   #4
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Its the same part on 4 and 5hp.
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Old 17 January 2013, 09:25   #5
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I am willing to give it a shot! Just put the 5hp up for sale but how much do you want for it and postage?
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Old 17 January 2013, 11:16   #6
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£20 any good?
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Old 19 January 2013, 20:56   #7
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It may well be. I am going to strip my one down to show the part as you have photographed it. Please hang on to the part until I can confirm if that's ok?
Many thanks
Andrew
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Old 19 January 2013, 22:10   #8
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No worries, pretty sure mines all complete, its a long shaft minus a gearbox. God compression etc. so should have some good bits on it.
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Old 24 January 2013, 17:19   #9
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I have not forgotton you - I am really busy at work and doing rya courses so had no chance to strip it down yet - I will get round to it. Thanks
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Old 24 January 2013, 18:06   #10
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No rush!
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Old 28 January 2013, 11:35   #11
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Struggling to find the valve! I have removed the carb but can't see the reed valve!
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Old 28 January 2013, 11:37   #12
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Quote:
Originally Posted by ajstars View Post
struggling to find the valve! I have removed the carb but can't see the reed valve!


Click image for larger version Name: image-855437596.jpg Views: 216 Size: 62.9 KB ID: 76084



Click image for larger version Name: image-1790423564.jpg Views: 173 Size: 53.9 KB ID: 76085
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Old 28 January 2013, 17:35   #13
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Em that's because you have an old air cooled 5B.
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Old 28 January 2013, 17:38   #14
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Oh so what could be the problem - I was told it was the reed valve! It was coughing out of the carb apparently.
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Old 28 January 2013, 17:48   #15
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Quote:
Originally Posted by ajstars
Oh so what could be the problem - I was told it was the reed valve! It was coughing out of the carb apparently.
I am not familiar with this engine but generally a cough or sneeze is caused by bad timing or running too lean.
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Old 28 January 2013, 17:50   #16
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I would have thought there is more to it than not. The engineer spent an hour on it! I wonder if the compression had gone or something. Hohum will have to strip it down but I bet you can't get parts for it any more.
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Old 28 January 2013, 18:10   #17
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You will have no problem getting parts for it. Is the plastic air box still there?
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Old 28 January 2013, 18:13   #18
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Yes it's all complete and otherwise in lovely condition
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