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Mercury 90 Service Manual

Mercury 90
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90-830234R3 DECEMBER 1997 ELECTRICAL - 2C-1
Timing/Synchronizing/
Adjusting (3 Cylinder
Models)
Specifications
65 JET, 75 and 90 Models
Full Throttle RPM Range
Model 75
Model 65 JET/90
4750 - 5250
5000 - 5500
Idle RPM (in “FORWARD” Gear) 675 ± 25 RPM
Maximum Timing
@ 3000 RPM
–75
–65JET/90
18 B.T.D.C.
20 B.T.D.C.
@ Cranking
Speed
–75
–65 JET/90
20 B.T.D.C.
22 B.T.D.C.
Idle Timing 2° A.T.D.C. –
6° B.T.D.C.
Spark Plug NGK BUHW-2
Firing Order
1994/1995 Models
1996/97/98 Models
1-3-2
1-2-3
Special Tools
1. Service Tachometer* 91-854008A1
2. Timing Light* 91-99379
3. Spark Gap Tool 91-63998A1
* May be obtained locally.

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Mercury 90 Specifications

General IconGeneral
BrandMercury
Model90
CategoryOutboard Motor
LanguageEnglish

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