1976 Johnson Outboard Motor 40 HP Service Repair Manual P/N JM-7609, Page 52Get this manual

1976 Johnson Outboard Motor 40 HP Service Repair Manual P/N JM-7609, Page 52

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Cleaning Carbon From Lower Ring Groove
Figure 5-20 Checking Piston Skirts for Roundness

Figure 5-23 Checking Groove Side Clearance damaging the groovetool for cleaning ring grooves

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