Installing The Y-Fitting - Mercury MerCruiser Service Manual

NOTE: When not installing the through‑the‑hull or through‑the‑transom seawater pickup, refer to Installing the Seawater
.
Supply Hose
Boat speed with the boat fully
loaded and operated within the
specified operating range
64 km/h (40 mph) or greater.
Models operated above the 50th
parallel of the Northern
Hemisphere or below the 50th
parallel of the Southern
Hemisphere.
Less than 64 km/h (40 mph)
64 km/h (40 mph) or greater
Greater or less than 64 km/h
(40 mph).
Models operated above the 50th
parallel of the Northern
Hemisphere or below the 50th
parallel of the Southern
Hemisphere.
Installing the Y‑Fitting
Engine models that require a through‑the‑hull or through‑the‑transom seawater pickup require a Y‑fitting at the engine seawater
pump inlet port. The Y‑fitting directs the seawater from the sterndrive and through‑the‑hull or through‑the‑transom seawater
pickup to the engine's seawater pump to meet the minimum flow specifications.
a
90-8M0099748 eng DECEMBER 2015
Seawater Pickups for Sterndrive Engine Models
Bravo has side water
pickup
30181
30181
30181
c
b
Bravo has dual water pickup
30180
30180
30180
a - Y‑fitting port to water inlet at
transom
b - Y‑fitting port to through‑the‑hull or
through‑the‑transom seawater
pickup
c - 10 cm (4 in.) hose, from seawater
pump inlet to Y‑fitting port
d - Seawater pump
d
56840
© 2016 Mercury Marine
Models with Closed Cooling
Through‑the‑hull or
through‑the‑transom
seawater pickup
Not required.
Refer to Installing the
Seawater Supply Hose.
Required.
Refer to Installing the
Y‑Fitting.
Required.
Refer to Installing the
Y‑Fitting.
Not required.
Refer to Installing the
Seawater Supply Hose.
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