Page 21 - REPOWER REFERENCE GUIDE (2020)

Important Information
Quicksilver Engine Specifications

Engine Specifications—3.0L TKS Alpha

3.0L TKS
Horsepower 1 135
Kilowatts 1 101
Number of cylinders 4
Displacement 181 cid (3.0L)
Compression ratio 9.25:1
Idle RPM in neutral 650–750
Maximum RPM at WOT 4400–4800
Minimum oil pressure at idle 28 kPa (4 psi)
Electrical system 12‑volt negative (–) ground
Minimum battery requirement 375 CCA/475 MCA/90 Ah
Firing order 1‑3‑4‑2
Spark plug type NGK BPR6EFS
Spark plug gap 0.889 mm (0.035 in.)
Timing in base timing mode 4° BTDC
Thermostat 60 °C (140 °F)
1 Performance obtained and corrected in accordance with SAE J1228/ISO 8665 Crankshaft Power.

Engine Specifications—350 MPI Alpha, Bravo, and Inboard
NOTE: Performance specifications are obtained and corrected in accordance with SAE J1228/ISO 8665 Crankshaft Power.
NOTE: Oil pressure specifications are for reference and may vary.
350 MPI
Horsepower 1 300
Kilowatts 1 224
Number of cylinders 8
Displacement 350 cid (5.7L)
Hot 65 A
Alternator amperage
Cold 72 A
350 MPI Alpha and Bravo 4600–5000
WOT 350 MPI Horizon Inboard WOT RPM
RPM 4400–4800
Idle in neutral Not adjustable
At 2000 RPM 124 kPa (18 psi)
Minimum oil pressure at idle
At idle 41 kPa (6 psi)
Non‑DTS models 750 CCA/950 MCA/180 Ah
Minimum battery requirement
DTS models 800 CCA/1000 MCA/190 Ah
Firing order 1‑8‑4‑3‑6‑5‑7‑2
Spark plug type NGK 1TR4A15
Spark plug gap 1.5 mm (0.060 in.)
Timing at idle Not adjustable
Seawater‑cooled models 71 °C (160 °F)
Thermostat
MPI models with closed‑cooling 77 °C (170 °F)
1 Performance obtained and corrected in accordance with SAE J1228/ISO 8665 Crankshaft Power.

90-8M0149179 eng NOVEMBER 2018 © 2019 Mercury Marine Page 1B-11