Reply To: Power Head Cross Reference for 1958 Evinrude Fisherman 5516

[Mike Nazarenko]

1. Regarding the paint.  It looks original.  Was the crankcase opened before – – I don’t have enough experience here. If original I would think the pistons and crank rods would be more identical in color .
2. Purchased this engine in Rochester, NY.
3. Attached the flywheel to the crankcase with only the top piston with rings.  There is minimal resistance, guess you call that rolling resistance.  Without the bottom piston it turns freely.  Here is the video   https://youtu.be/3h77KJXe_F4
4. Before I disassembled the crankcase with just the top piston in I did a compression test, all cylinder head bolts and crankcase screws were torqued to 60 in lbs.  Compression test reading was 60 lbs.
5. Disassembled the crankcase and put the top piston into the bottom cylinder, torqued all cylinder head bolts and crankcase screws to 60 in lbs.  Compression test reading was 60 lbs.
6. Disassembled the crankcase put the bottom piston into the top cylinder and gently torqued the crank rod cap screws, secured the other half of the crankcase.  Cranking was difficult, confirming the bottom crank rod journal is bad.
7. Cylinder bore and piston measurements in attached photo.  Not easy to do.  Not sure what to make of the measurements.  If you believe the readings the piston shouldn’t fit into the cylinder.
8. Ordered parts yesterday from EdE, very helpful.
9. Everyone thank you for your helpful comments.