Mercury 305 CID - Page 203

ENGINES - 3A-1190-823225--1 1096
350 CID Gen + Engine Specifications
Unit Of Measurement
In. (mm)
NOTE: These specifications cover only Gen + engines.
CYLINDER BORE
Diameter
4.0007-4.0017
(101.618-101.643)
Out of Round
Production .0005 (0.12) Max
Out
of
Round
Service .002 (0.05) Max
T
Production
Thrust Side .0005 (0.012) Max
Taper
Production
Relief Side .001 (0.025) Max
Service .001 (0.025) Over Production
PISTON CLEARANCE
Production
.0007-.0021 (0.018-0.053) Max
Service .0027 (0.068) Max
PISTON RING: COMPRESSION
GCl
Production
Top
0012
-
0032 (0 030
-
0 081)
Groove Clearance
Production
2nd
.
0012
-.
0032
(0
.
030
-
0
.
081)
Service High Limit Production + .001 (0.025)
G
Production
Top .010-.020 (0.25-0.51)
Gap
Production
2nd .018-.026 (0.46-0.66)
Service High Limit Production ± .010 (0.25)
PISTON RING: OIL
Groove Clearance
Production .002-.007 (0.051-0.17)
Groove
Clearance
Service High Limit Production ± .001 (0.025)
Gap
Production .010-.030 (0.25-0.76)
Gap
Service Limit High Limit Production ± .001 (0.25)
PISTON PIN
Diameter
.9270-.9271 (23.545-23.548)
Clearance
Production .0004-.0008 (0.0120-0.0210)
Clearance
Service Limit .0010 (0.025) Max
Fit in Rod .0008-.0016 (0.021-0.40) Interference