Page 189 - REPOWER REFERENCE GUIDE (2020)

Manifolds and Elbows with Dry Joint

31791
Seawater-cooled V-drive model

31792
V-drive model with closed cooling

IMPORTANT: To ensure correct torque, the exhaust elbow screws without a flanged head require that a specific flat
washer be used in conjunction with the screw. If a flange head bolt is used, no washer is needed. Refer to the Mercury
Precision Parts/Quicksilver Accessories Guide.
13. If applicable, assemble washers to the exhaust elbow bolts.
14. Apply sealant to exhaust elbow bolt threads and hand‑start to temporarily secure the assembly.

Tube Ref No. Description Where Used Part No.
19 Perfect Seal Exhaust elbow bolt threads 92-34227Q02
15. Align the exhaust elbow to the engine exhaust system.
NOTE: Gasket is not reusable. Inspect for proper gasket and component position before tightening.
16. Tighten the exhaust elbow fasteners.
IMPORTANT: Tighten the fasteners evenly, using an x‑pattern from corner to corner.

Description Nm lb‑in. lb‑ft
First pass 9 79.7 –
Exhaust‑elbow‑to‑exhaust‑manifold‑bolt or nut
Final pass 61 – 45
17. Seawater‑cooled models: Connect the engine water hoses to the exhaust elbows and tighten hose clamps securely.

90-8M0149179 eng NOVEMBER 2018 © 2019 Mercury Marine Page 7B-11