See page ii for engine models 5.7L Carb 5.7L TBI 5.7L MPI LS1/LQ9 8.1L MPI
Number of Cylinders V-8
Displacement 350 CID (5.7L) 496 CID (8.1L)
Bore/Stroke
4.0012 x 3.480 in. (101.63 x 88.39 mm)
3.898 x 3.622 in. 4.25 x 4.37 in.
(99 x 92 mm) (108 x 111 mm)
Compression Ratio 9.4:1 10.1:1 9.1:1
Compression Pressure (Note 1) Minimum 100 PSI (690 kPa)
Idle RPM in Neutral (Note 2) 650 ± 50 RPM
Operating Range at WOT 4400-4800 RPM 4600-5200 RPM 5200-5600 RPM 5000-5400 RPM
Oil Pressure at Idle 4 PSI (41 kPa) Minimum - Hot
5 PSI (34kPa) Minimum
Oil Pressure at 2000 RPM 18 PSI (124 kPa) Minimum Hot
10 PSI (69kPa) Minimum
Oil Filter Pennzoil PZ3, AC-PF25 AC-PF454
Fuel Pump Pressure 8 PSI Max 30 PSI Min at Keyup 50 PSI Min at Keyup
(55.2 kPa) (206.8 kPa) (344.7 kPa)
Electrical System 12 Volt DC Negative (-) Ground
Minimum Battery Requirements 550 cca/700 mca/120Ah
Firing Order 1-8-4-3-6-5-7-2 1-8-7-2-6-5-4-3
Spark Plug Type MR43LTS or 41-932 (Platinum Tip) AC 41-974 AC 41-983
Spark Plug Gap 0.030 in. (.76 mm) 0.045 in. (1.1 mm) .060 Platinum 0.050 in. (1.3 mm)
Base Timing at 1000 RPM (Note 3) 10˚ Before Top Dead Center Non Adjustable
Thermostat 160° F (71° C)
Indmar Marine Engines B-1
Appendix – B
ENGINE SPECIFICATIONS
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