Boat Out Of The Water; Three-Point Manual Drain System; Boat In The Water - MerCruiser 4.3L TKS Sterndrive Owner's Manual

7. Close the drain system by rotating the blue handle clockwise until it stops and install the blue drain plug, if removed. The
handle is fully seated when no red is visible. Do not overtighten the handle, as this action will create new threads.
8. Open the seacock (if equipped) or unplug and reconnect the water inlet hose before operating the engine.

Boat out of the Water

1. Place the boat on a level surface to ensure complete draining of system.
2. Rotate the blue handle counterclockwise until it stops (approximately two turns). The red on the handle shaft indicates that
the drain system is open. Do not overtighten the handle, as this action will create new threads.
3. Visually verify that water is draining. If water does not drain, remove the blue drain plug from the distribution housing and
drain manually.
b
a
4. Allow the system to drain for a minimum of five minutes. We recommend leaving the plugs out while transporting the boat or
performing other maintenance to ensure that all water is drained.
5. Close the drain system by rotating the blue handle clockwise until it stops or installing the blue drain plug. The handle is fully
seated when no red is visible. Do not overtighten handle, as this action will create new threads.
Three‑Point Manual Drain System

Boat in the Water

NOTE: Use this procedure if your engine is not equipped with an air‑actuated single‑point drain system or if the air‑actuated single
point drain system fails.
1. Close the seacock (if equipped) or remove and plug the water inlet hose.
90-8M0053265 NOVEMBER 2010
a - Blue handle
a
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a - Drain location ‑ orange or red
b - Blue drain plug
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Section 6 - Storage
Page 85