1984-1986 Mercury Force 9.9 and 15HP Outboards Service Manual, Page 46Get this manual

1984-1986 Mercury Force 9.9 and 15HP Outboards Service Manual, Page 46

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UNBURNED FUEL IN NO.1 CYLINDER
TROUBLESHOOTING
Poor engine performance andor hard starting may be signs of compression problem Other signs include excessively smoky exhaust, badly fouled p