Poppet Valve; Poppet Valve Assembly-Exploded View; Poppet Valve Operation - Mercury MerCruiser Service Manual

All Models

Poppet Valve

Poppet Valve Assembly—Exploded View
7
6
5
4
3
2
1
Ref. No. Qty.
– 1
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 2
9 1
10 1
11 1
12 1
13 2
14 1
15 2
16 2

Poppet Valve Operation

A poppet valve is installed in the seawater portion of the cooling system of all emission controlled engines in order to control the
flow of the cooling seawater. There are two major functions of the poppet valve.
1. The poppet valve controls the amount of seawater supplied to the exhaust system from idle to wide‑open throttle.
Page 6A-14
8
9
10
11
12
13
Description
Poppet valve subassembly
Pan head screw
Washer
Diaphragm
Relief valve plate
O‑ring
Compression spring
Poppet
M6 x 18 hex head flange screw
Inlet fitting
O‑ring
Poppet valve housing
Cover
M6 x 25 hex head flange screw
Poppet valve bracket
J‑clip
M6 x 12 hex head flange screw
© 2016 Mercury Marine
14
Torque
Nm lb‑in.
2.5 22.1
8.5 75.2
8.5 75.2
8.5 75.2
90-8M0099748 eng DECEMBER 2015
16
15
56674
lb‑ft
–
–
–
–