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4.3 TKS
This popular model powers everything from family runabouts to houseboats. Its smooth power delivery and excellent fuel economy make it a great choice for boaters who want lots of torque without the extra weight or size of a V-8. The 4.3 TKS features MerCruiser’s exclusive Turn-Key Start (TKS) system. This patented feature eliminates the hassle of starting a cold engine. Simply turn the key – no choke, pumping or priming are required. The entire MerCruiser gas lineup features Turn Key Starting. No other engine manufacturer can match that.
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4.3 TKS |
| Power |
190HP (142 KW) |
| Full Throttle Range |
4400 - 4800 RPM |
| Displacement |
262 CID (4.3L) |
| Engine Type |
V6 |
| Bore & Stroke |
4.00" X 3.48" (101mm X 88mm) |
| Compression Ratio |
9.4:1 |
| Fuel Requirement |
87 Octane (R+M)/2 |
| Fuel System |
2V Carb with Turn Key Start & Electric Fuel Pump |
| Induction System |
Dual Plane Iron Intake Manifold |
| Ignition System |
Thunderbolt V |
| Charging System |
65 Amp/917 Watt Alternator |
| Water Drain System |
Multi Point Drain - Hand Removable Blue Drain Plugs |
| Exhaust System |
EDP Coated Iron Manifold with EDP Coated Dry-joint Elbow |
| Cooling System |
Thermostatically Controlled, Raw Water |
| Accessory Drive System |
Serpentine Belt |
| Recommended Engine Oil |
MerCruiser Full Synthetic Engine Oil - SAE 20W-40 |
| Engine Guardian System |
Low Oil Pressure, High Coolant Temperature, Low Drive Lube |
| Alpha Ratios |
1.62, 1.81, 2.0(H) |
| Bravo One Ratios |
N/A |
| Bravo Two Ratios |
2.00, 2.20 |
| Bravo Three Ratios |
2.20, 2.43 |
| Dimensions (LxWxH) in |
28 x 30 x 21 |
| Dimensions (LxWxH) mm |
696 x 740 x 533 |
| Weight w/ Alpha (lbs./kg) |
848/385 |
| Weight w/ Bravo One (lbs./kg) |
N/A |
| Weight w/ Bravo Two (lbs./kg) |
893/405 |
| Weight w/ Bravo Three (lbs./kg) |
902/410 |
| Optional Freshwater Cooling |
Available |
Features
4.3 TKS - 190 hp
Reliability
- Thunderbolt V Hi-Energy Ignition and platinum-tipped spark plugs ensure reliable starts
- Dry-joint exhaust eliminates the chance for water to enter engine through leaky gaskets
- Water-separating fuel filter helps protect fuel system and engine against damage
- Industry-exclusive 3-year limited corrosion failure warranty
- Proven GM cast iron block V6 power for years of reliable operation
- EDP-coated exhaust elbows resist temperature and corrosion for long life
- Serpentine belt system for longer belt life
Performance
- Dual Plane intake manifold for improved fuel atomization means more power & torque
- Revised fuel calibration for more crisp acceleration and improved running quality
- Standard anti-feedback power steering helps reduces operator fatigue and makes boat handling a breeze
- Low restriction flame arrestor for added horsepower and torque
Easy Ownership
- 3-year/300 hour maintenance interval on many periodic service items saves time and money
- Easy Oil Drain system is cleaner and makes periodic service simple and less work
- Color-coded service points makes checking fluid levels simple and straightforward
- Operates on easy to find, less expensive 87 octane fuel
- Engine-mounted drive lube monitor for easy lube check or add from inside the boat
- No tools required to drain water from engine with blue drain plugs
Technology
- Turn Key Starting for easy starts, cold or hot, every time with no choking or priming
- Helm-mounted Audio Warning System monitors oil pressure, engine temperature and drive lube level and provides instant alarm if any of these vary from normal range
- MerCathode galvanic corrosion prevention system standard on Bravo models, available on Alpha models, offers unmatched active electronic corrosion protection
- Large 65 Amp alternator provides plenty of power for popular onboard electronics
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