Robin EY20 Service Manual

11-5 ENGINE KNOCKS
1) Low-quahty gasoline.
2) Engine operating under heavy load at low speed.
3) Carbon or lead deposits in the cylinder head.
4) Spark timing incorrect.
5) Loose connecting rod bearing due to wear.
6) Loose piston pin due to wear.
7) Causes of engine overheat.
11-6 ENGINE BACKFIRES through CARBURETOR
1) Water or dirt in gasoline, or low-grade gasoline.
2) Intake valve stuck.
3) Valves overheated, or red-hot carbon particles in the combustion chamber.
4) Engine cold.
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Robin EY20 Specifications

General

Ignition System	Transistorized magneto
Starting System	Recoil starter
Fuel	Unleaded gasoline
Oil Capacity	0.6 liters
Displacement	183 cc
Bore x Stroke	67 x 52 mm
Dry Weight	15 kg