Mercury 45 Jet 50-55 - Quicksilver Lubricants and Service Aids; Special Tools; Specifications

POWERHEAD - 4-190-817643R1 DECEMBER 1996
Specifications
General
Type Two-Stroke Cycle
Displacement 51.8 cu. in. (849 cc)
Cylinder Bore
Diameter Standard 2.955 in. (75.057 mm)
Diameter .015 Oversize 2.970 in. (75.438 mm)
Diameter .030 Oversize 2.985 in. (75.819 mm)
Out of Round (Max.) 0.003 in. (0.08 mm)
Taper (Max.) 0.003 in. (0.08 mm)
Piston
Diameter Standard 2.950 in. (74.93 mm)
Diameter .015 Oversize 2.965 in. (75.31 mm)
Diameter .030 Oversize 2.980 in. (75.69 mm)
Piston Ring
End Gap 0.010 in. – 0.018 in.
(.254 mm – .457 mm)
Crankshaft
Runout (Max.) 0.002 in. (0.05 mm)
Special Tools
Part No. Description
91-52344 Flywheel Holder
91-24161 Protector Cap
91-73687A1 Flywheel Puller
91-90455 Lifting Eye
*91-24697 Piston Ring Expander
91-74607A2 Piston Pin Tool
91-77109A1 Lockring Installation Tool
*91-32610 Torque Wrench (0 – 200 lb. ft.)
(0 – 27 N·m)
*91-66274 Torque Wrench (0 – 150 lb. ft.)
(0 – 20 N·m)
91-25821A1 Powerhead Stand
*May be obtained locally
Quicksilver Lubricants and
Service Aids
Part No. Description
92-32609-1 Loctite 271 Grade “A”
92-12564--1 Master Gasket Sealant
92-42649A1 Needle Bearing Assembly
Lubricant
92-13249A24 2 Cycle Outboard Oil
92-59327-1 Loctite Primer “T”
92-90018A12 2-4-C Marine Lubricant
92-34277-1 Perfect Seal
* Loctite 272
*May be obtained locally