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Mercury 40 Service Manual

Mercury 40
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CYLINDER BLOCK/CRANKCASE
Page 4B-18 90-828631R3 MARCH 1999
9. Remove crankshaft from block.
a
a-Main Bearings – Do Not Interchange. Reinstall in Original Locations
Inspection
Cylinder Bore
MEASURING CYLINDER BORE
1. Measure the cylinder bore diameter “d” at three locations in both X and Y axis.
2. If the cylinder bore is beyond the standard limits listed in the tables below, it will be nec-
essary to re-bore the cylinder to accept the oversize piston.
55837
Cylinder Bore Specifications
Diameter (Standard) 2.4803 - 2.4809 in.
(63.000 - 63.015 mm)
Taper or Out-of-Round Maximum
Limit
0.003 in. (0.08 mm)
Diameter 0.020 in.
(0.50 mm) Oversize
2.5003 - 2.5009 in.
(63.500 - 63.515 mm)
Taper or Out-of-Round Maximum
Limit
0.003 in. (0.08 mm)

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Mercury 40 Specifications

General IconGeneral
BrandMercury
Model40
CategoryOutboard Motor
LanguageEnglish

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