Page 231 - REPOWER REFERENCE GUIDE (2020)

Single Catalyst V8 Engines

Closed‑Cooling Applications
Rise Port exhaust elbow Starboard exhaust elbow

15 cm (6 in.)
or
20 cm (8 in.)

50980 50978

Manifold Fittings
The charts below illustrate the possible exhaust manifold coolant fitting combinations. In seawater‑cooling applications,
manifold coolant fittings conduct seawater. In closed‑cooling applications, manifold coolant fittings conduct glycol‑based
coolant.

Seawater‑Cooling Applications
Model Bottom Port side Starboard side

Models with No coolant fittings No coolant fittings
multi‑point drain

50985

All other models
with seawater No coolant fittings No coolant fittings
cooling

50986

90-8M0149179 eng NOVEMBER 2018 © 2019 Mercury Marine Page 7E-15