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https://haynes.com > en-us > mercury-outboard
This Mercury manual is 368 pages. QUICK REFERENCE DATA. CHAPTER ONE / GENERAL INFORMATION Manual organization / Notes, cautions and warnings / Torque ...
the serial number begins 2487558 and continues past 2491265 and as the beginning serial number denotes the year , your engine is 1969 model
it shows as a 2 stroke with auto oil injection
check the heads
if the plugs are in the flat of the head and there are no rocker covers it is 2 stroke
talk with a mercury /mariner service center
If your old engine/control has the same 'options' as the30hp, yes everything is compatible... (Electric start or trim )
The throttle and shift cables are allways compatible...
Mariner 4hp are identical to Yamaha engines.
You should find a sticker on the port bracket with serial and model number.
If that sticker has disappeard, an aluminum piece is stamped in the side of the cilinder. The numbervstamped in that round pieceis the serial number. I can convert that serial number in a year/model number...
Hey Steven,
get one of these manuals, you will be glad you did,, it will serve you well for as long as you own your Mariner! The guys at MarineEngine will be glad to help you too!!
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