Specifications - Mercury 30 Service Manual

Specifications

BLOCK
REED VALVE OPENING
STROKE
CYLINDER BORE
PISTON
PISTON RING
WATER PRESSURE
*See important information below.
IMPORTANT: Using a micrometer, measure di-
mension "A" at location shown. Dimension "A"
should be 2.988 in. ± .001 for a STANDARD size
piston.
Dimension " A"
at Right Angle
°
(90 ) to Piston
Pin
"A"
90-826148R2 MARCH 1997
Type
Displacement
Opening (Max. Allowable)
Length
Dia. Standard
Taper/Out of Round Max
Dia. Standard*
End Gap
With Thermostat + Poppet
@ Idle
@ W.O.T.
All Models W/O Thermostat + Poppet
@ Idle
@W.O.T.
Poppet Valve Opening 1994-1997
Poppet Valve Opening 1998 & Newer
0.50 in.
(12.7mm)
52676
2 Cyl. Loop Charged
39.3 cu. in. (644.4cc)
0.020 in. (0.50mm)
2.796 in. (71.0mm)
2.993 in. (76.0mm)
0.003 in. (0.08mm)
2.988 in. (75.90mm)
0.010 in. to 0.018 in.
(0.254mm to 0.457mm)
1/2 - 1-1/2 PSI @750 RPM
5 - 7 PSI @ 5000 RPM
0 - 1 PSI @ 750 RPM
5 - 7 PSI @ 5000 RPM
900-1000 RPM
3000-3500 RPM
TOP
CENTER
BOTTOM
POWERHEAD - 4-1