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I've got one and it's still running fine only ever replaced a coil, still use on the river Murray in South Australia, had it from brand new cost $595 AUD bargain.Yep - that is a 1974 model.
It was built by Yamaha, carbon copy of their own model P250A (later called the model 15A) which they built as a Yamaha between 1972-78.
These were produced under a joint venture deal with Merc which initially prevented them from being sold in North America. It was Merc's attempt to break into "other than" N.A. markets with a lower cost alternative to the Mercury line.
These were well built and because of the following some became popular worldwide, but they were a "no frills" motor and later models generally had "older" technology which helped keep the cost down.
For parts Merc lists this as a model 15A (same as Yami).
Unfortunately, many parts for these are just no longer available. While you can get an impeller you will not find a single carb part at most dealers. So if it's running, take good care of her - you may not be able to replace something if it breaks.
How about model number 684 CS 031136Not that it matters but Yamaha lists that serial number as a 1975 model year motor.
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How about model number 684 CS 031136Not that it matters but Yamaha lists that serial number as a 1975 model year motor.
View attachment 30516