Page 230 - REPOWER REFERENCE GUIDE (2020)

Single Catalyst V8 Engines
Exhaust Coolant Fittings

The coolant fittings used on the exhaust manifold or elbow vary according to application. Fittings typically will not need to be
replaced. Should an elbow need to be replaced, new fittings are supplied with the new elbow. Refer to the instructions that
come with the new elbow for installation details.
Elbow Fittings

The charts below illustrate the possible exhaust elbow coolant fitting combinations.
• For seawater‑cooling applications, the available fittings are dependent only on whether it is an MCM (sterndrive) or MIE
(inboard or TowSport) model.
• For closed‑cooling applications, the available fittings are dependent only on the elbow's rise height.
• Regardless of the application, all fittings on the elbow conduct only seawater (not coolant/antifreeze).
NOTE: Exhaust elbows are port and starboard‑specific in the 0‑inch, 2‑inch, and 4‑inch riser heights.
NOTE: Due to the many sizes of elbows and the starboard/port variations, images may not exactly match a given configuration.
Seawater‑Cooling Applications
Model Port exhaust elbow Starboard exhaust elbow

Sterndrive

50975 50975

Inboard
or
TowSport

50976 50975

Closed‑Cooling Applications
Rise Port exhaust elbow Starboard exhaust elbow

0 cm (0 in.),
5 cm (2 in.),
or
10 cm (4 in.)

50979 50977

Page 7E-14 © 2019 Mercury Marine 90-8M0149179 eng NOVEMBER 2018