Mercury XR2 User Manual

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INSTALLATION
ghc3
3
4
a
OUTBOARD MOUNTING HEIGHT
3 Use the following chart to determine the proper mounting height
(a) for your outboard.
Gear Case
Application
Minimum Height
(a)
Maximum Height
(a)
Sport Master 27” (68cm) 30” (76cm)
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Propeller Selection
4 For best all around performance from your outboard/boat combi-
nation, select a propeller that allows the engine to operate in the
upper half of the recommended full throttle RPM range with the
boat normally loaded (refer to Specifications). This RPM range
allows for better acceleration while maintaining maximum boat
speed.
If changing conditions cause the RPM to drop below the recom-
mended range (such as warmer, more humid weather, operation at
higher elevations, increased boat load, or a dirty boat bottom/gear
case) a propeller change or cleaning may be required to maintain
performance and ensure the outboards durability.
Check full-throttle RPM using an accurate tachometer with the en-
gine trimmed out to a balanced-steering condition (steering effort
equal in both directions) without causing the propeller to “break
loose.”

Mercury XR2 Specifications

General

MODEL	XR2
Horsepower	180 (134kw)
Propshaft Kilowatts1	194
Full Throttle RPM Range	6000-7000
Idle RPM in Forward Gear	650-750
Maximum Timing	25° BTDC
Idle Speed Pickup Timing	2° ATDC
Gear Ratio	1.87:1
Piston Displacement	122 cu. in. (2.0L/1998cc)
Bore	3.125 in. (79.5 mm)
Stroke	2.65 in. (67 mm)
Firing Order	1-2-3-4-5-6
Recommended Spark Plug	NGK-BUHW (P/N 33-97180)
Fuel Pressure	5 - 6 psi
Recommended Gasoline	Refer to Fuel Section
Recommended Oil	Refer to Fuel Section
Recommended Gear Case Oil	Quicksilver Hi-Performance Gear Lube (92-816026A4)
Gear Case Lubricant Ca- pacity	22.5 fl. oz. (666 ml)
Charging System Output	16 amps @ 7000 RPM
Battery Rating	Minimum reserve capacity rating of 100 minutes and CCA of 350
Water Pres. @ WOT	15 PSI (103.4 kPa)

Weight and Dimensions

Weight	350 lbs. (159 kg)
Transom Height	Short Shaft = 15” (381mm) Long Shaft = 20” (508mm)