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Mercury 20 EFI FourStroke Service Manual

Mercury 20 EFI FourStroke
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Tube Ref No. Description Where Used Part No.
110
10W-30 4-Stroke Marine
Engine Oil
Crankshaft seal and main bearing area, crankshaft main and
connecting rod journals, connecting rod bearing area, upper
and lower oil crankshaft seal lips
92-8M0078625
4. Carefully place the crankshaft onto the cylinder block main bearings.
5.
Ensure the crankshaft seals are parallel with the crankshaft and centered in the seal area of the cylinder block.
6. Attach the connecting rods to the crankshaft journals.
7. Ensure that the arrow on the connecting rod cap points up.
8. Install new connecting rod cap bolts.
9. Tighten the connecting rod cap bolts to the specified torque in two steps.
a - "Up" arrow and text
b - Connecting rod cap bolt
c - Connecting rod cap
Description Nm lb‑in. lb‑ft
Connecting rod cap bolt
First
6.0 53.1 –
Final
10.0 88.5 –
10. Clean the cylinder block to crankcase mating surfaces of oil and debris.
11. Apply a continuous bead of Loctite® Master Gasket to the contact surface of the crankcase. Follow the instructions
contained in the kit.
12. Ensure that the dowel pins are inserted into the cylinder block, and install the crankcase cover.
a - Dowel pins (2)
b - Crankcase cover mating surface
Tube Ref No. Description Where Used Part No.
12
Loctite® Master Gasket
Kit
Cylinder block and crankcase cover mating surfaces 92-12564 2
13. Lubricate the main bearing and crankcase cover bolts with clean engine oil.
a
b
c
64154
a
a
b
64155
Cylinder Block/Crankcase
90-8M0125265 eng NOVEMBER 2017 © 2018 Mercury Marine Page 4A-27

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Mercury 20 EFI FourStroke Specifications

General IconGeneral
BrandMercury
Model20 EFI FourStroke
CategoryEngine
LanguageEnglish

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