1978 Evinrude 2 HP Outboards Service Repair Manual P/N 5391, Page 39Get this manual
Quality of the image is intentionally reduced!
5-6 ring ladsSee Figure 5-13 Check piston for size ad using micrometerCorrect sizes given in Section 2ldss,
Figure 5-14 Checking Ring Gap
Insert wrist pin through slip fit sidepisto