Reed Block Assembly - Mercury 150 EFI Service Manual

3. Thoroughly clean (with solvent) and dry crankshaft center main roller bearings. Lubri-
cate bearings with 2-Cycle Outboard Oil.
DO NOT intermix halves of upper and lower crankshaft center main roller bearings.
Replace bearings in pairs only.
4. Thoroughly inspect center main roller bearings. Replace bearings if they are rusted,
fractured, worn, galled or badly discolored.
5. Clean (with solvent) and dry crankshaft roller bearing that is installed in upper end cap.
Lubricate bearing with light oil.
6. Thoroughly inspect upper end cap roller bearing. If roller bearing is rusted, fractured,
worn, galled, badly discolored or loose inside of end cap replace end cap and roller bear-
ing as an assembly.

Reed Block Assembly

IMPORTANT: Reed block assembly is not serviceable. If reeds are damaged replace
reed block assembly.
1. Thoroughly clean gasket surfaces of reed blocks and reed block housing. Check for
deep grooves, cracks and distortion that could cause leakage. Replace parts as neces-
sary.
2. Check for wear (indentations) on face of each reed block. Replace reed block assembly
if reeds have made indentations.
3. Check for chipped and broken reeds.
Allowable reed opening is 0.020 in. (0.51 mm) or less. Replace reed block assembly if any
reed is standing open more than 0.020 in. (0.51 mm).
90-883728 JULY 2001
CAUTION
Center main
Roller Bearing
Upper Roller
Bearing
POWERHEAD
51851
Page 4A-47