Mariner or Yamaha????

[Phil 2616]

Hi Guys,<br />Got a Mariner 20 I'm rebuilding.The engine plate reads: YAMAHA 20A with the serial No.653 L 300386.Does this No. make it a 1977 Mariner?Stamped in the bottom corner of the plate is the letter U.I'm told this makes it a 1978 yamaha?A local repair shop said it was a japanese built (Yamaha) Mariner so I bought the Clymer Mariner Repair Manual 1976-89 but none of the photos/diagrams or specs seem to match my engine.The book also says no more than 50:1 oil ratio for all Mariners but info on my engine says 100:1.It says MARINER on the engine cover but nowhere else.Now they think it could be a Yamaha with a mariner cover fitted!Any ideas?

 

[bossee]

Re: Mariner or Yamaha????

The engine plate reads: YAMAHA 20A with the serial No.653 L 300386.<br />----------<br />I checked on this (Swedish) site and it is a serial no for a Yamaha:<br /> http://www.marinshopen.se <br />(and button Modellguide in upper right corner, then link Yamaha on next page)<br /><br />653 1972-1978 P-400/20A (20HK) <br /><br />Does this No. make it a 1977 Mariner?<br />-------<br />Does not seems so...<br /><br />Stamped in the bottom corner of the plate is the letter U. I'm told this makes it a 1978 yamaha?<br />----------<br />That is correct.<br />Se above URL in the beginning of that page.<br />1978 - U<br /><br />A local repair shop said it was a japanese built (Yamaha) Mariner so I bought the Clymer Mariner Repair Manual 1976-89 but none of the photos/diagrams or specs seem to match my engine.<br />--------<br />Buy a Clymer or Seloc Yamaha repair manual that covers 1978 and you probably will get the correct manual.<br /><br />The book also says no more than 50:1 oil ratio for all Mariners but info on my engine says 100:1.<br />------<br />50:1 is the universal mixture gasil that is used in almost all 2-stroke outboards, but if otherwise written in instruction book or elsewhere You could try that. I would use 50:1 to be on the safe side in all cases, 100:1 mixture will not give you much margins regarding lubrication, rust prevention etc that the oil is there for.<br /><br />It says MARINER on the engine cover but nowhere else. Now they think it could be a Yamaha with a mariner cover fitted!Any ideas? <br />-------<br />Mercury and Yamaha is, and has been, using same powerheads in many engines. I do not know for how long. Mercury and Mariner are, at least in later years, same engines. So probably You have a Mariner cover on a Yamaha powerhead and rigg. That would be my best guess (but I may be wrong).<br /><br />Good luck.

 

[big_johnst]

Re: Mariner or Yamaha????

Phil,<br /><br />You are probably the owner of a Mariner made by Yamaha. Mariner bought a bunch of motors from Ymaha back in the 70's and 80's.I have an '85 55 HP Yamaha/Mariner. I have been frustrated by the same problesm. I can't seem to find a Mariner manual that covers my motor. Very frustrating for a do yit yourselfer like myself. Fortunately the original dealer is still in business and supports my motor. There is also an independent repair shop that knows and works on these motors. I am able to get parts. I have also found out that C55 Yamaha parts fit my motor. Good luck