Position Description Example
1 Component code
A ‑ Head assembly
B ‑ Cast block
C ‑ Crank
D ‑ Camshaft
E ‑ Electric box assembly
F ‑ IAFM
G ‑ Gearcase
H ‑ Cast head
J ‑ Power trim assembly
K ‑ Fuel supply module
L ‑ AMS counter rotation
M ‑ IOM
N ‑ Fuel rail
P ‑ Connecting rod
R ‑ AMS standard rotation
S ‑ Supercharger
T ‑ Balance shaft
2 Family code
A ‑ Verado 4 cylinder SC, 6 cylinder SC
B ‑ Verado 4 cylinder SC
C ‑ Verado 6 cylinder SC
D ‑ Verado 4 cylinder NA
E ‑ Available
F ‑ Available
G ‑ Verado 4 cylinder SC, 4 cylinder NA
H ‑ Verado 4 cylinder SC, 4 cylinder NA and 6 cylinder SC
J ‑ 4 cylinder 135/150 hp
K ‑ 4 cylinder SC 175 hp
L ‑ Bedrock
M ‑ MerCruiser common
N ‑ MerCruiser V6
P ‑ MerCruiser V8
T‑ Tigershark
Z ‑ Verado 350 hp racing
X ‑ Multi‑Family part usage
3 Year The last digit of the build year
4–6 Julian day The julian day of the build year
7–8 Military hour Two digit military hour of the build day
9–10 Sequence number The build sequence within the build hour
If the engine serial number and/or model decals are missing, the engine code letters may help in determining the engine
models.
Tools
Kent‑Moore
The tools listed below are some of those available from Kent‑Moore Corporation. Equivalent tools may be available from other
tool manufacturers. Regardless of supplier, always use the correct tool for the task at hand.
IMPORTANT: Part numbers are subject to change. Verify the correct tool part number with Kent‑Moore.
Engine Disassembly
90-8M0099748 eng DECEMBER 2015 © 2016 Mercury Marine Page 3A-3