The serial number 5591101 on a Mercury 4hp outboard motor indicates that it was manufactured in 1982. Mercury outboard motors typically have a serial number system that correlates to specific production years, and this number falls within the range for that year. For precise identification, you can also check the manufacturer's resources or consult a Mercury dealer.
To find out how old a 4HP Mercury outboard is, you can look at the label on the transom bracket, where you will see a two digit number giving you the year it was built.
You may have mistaken the '1' for a '2'..if your engine is a 4hp 2 cylinder it dates from 1978.
1969
The 4WF69B model, 4hp Johnson, would be a 1969 year model.
0.020 in.
The Yamaha 4HP outboard motor with the serial number 6EOK S 1005264 was manufactured in 1996. Yamaha typically uses a coding system for their serial numbers, and the "6E" prefix indicates a model from the 6E series, which corresponds to that production year. For precise verification, you can also refer to Yamaha's official documentation or contact a Yamaha dealer.
b 08800420
1969.
1969
An Evinrude outboard motor with a serial number that begins with the letter "S" typically indicates that it was manufactured in 1975. The "S" designation is part of Evinrude's coding system to identify the production year. To determine the exact year, you can also consult the Evinrude serial number chart for confirmation.
Mine is a 2000 model and it has an NGK R BPR7HS10
A 4hp Mercury outboard requires a 50:1 fuel to 2 cycle oil mix.