Suzuki 50 & 175hp Engines

These motors feature a big block in-line four-cylinder design that offers the largest displacement, rated at 2867cc’s, of any 4-stroke, four cylinder engine in the same power class. It offers increased low down torque to power big boats out of the hole with smooth acceleration through planing speeds to flat out throttle. This improved design also offers advantages in weight with the motors weighing only 465lbs or 211kgs. Suzuki say that makes them lighter than any other competitive engine of the same size.

Both motors sport dual overhead cams and four valves per cylinder. They are built with forged aluminium pistons which being lightweight help the engine reach high revs quicker producing a quicker throttle response time. The engine is designed to breath efficiently via an exclusive three piece composite intake manifold to give an efficient fresh air flow path from the intake at the rear of the cowling. Suzuki’s multi-stage induction system automatically changes the length of the intake manifold pipes adjusting them to the current engine speed for better combustion and to maximise performance at any rpm. Another exclusive is the spherical bore throttle body producing a smoother airflow when the throttle is initially opened.

The bigger DF175 is fitted with Suzuki’s proven variable Valve Timing (VVT). VVT sees the intake valve timing continually adjusted to give maximum performance, plus improves fuel economy but reduces emissions.

Both the 150 and 175 offer advanced digital sequential electronic fuel injection for incredible performance and instant throttle power, again this also reduces emissions in to the atmosphere but gives greater fuel economy. A powerful onboard 32-bit computer can monitor engine sensors and controls the fuel injection and direct ignition systems for optimum performance in all conditions.

The advanced fuel system utilises a water cooled heat exchanger lowering the fuel temperature prior to it reaching the engine increasing the density of the fuel to boost power output.

A high output 44-amp alternator features a water cooled regulator to improve reliability. Both motors are also supplied with a standard battery isolator system to keep the power flowing where it’s ultimately needed. This allows you to drain your boats auxiliary battery powering the radar, fish finders and other electronics, while still maintaining a full cranking battery. When the motor is re started, the system will automatically sense the low charge in the auxiliary battery which is recharged quickly.

For rapid acceleration Suzuki have pioneered a super strong lower unit and gear case with a final drive ratio of 2.50:1. In class it’s the lowest gear ratio and can handle larger diameter and higher pitched propellers than competitive motors. They are also available with counter rotation for dual engine application.

Other features include a counter balancing system chain driven off the crankshaft and mounted to the block designed to minimise horizontal vibration. There is also a Thrust Mounting System to absorb and educe engine vibrations at speeds under 2000rpm, plus Suzuki’s offset driveshaft design lowers the engine profile and brings the engines centre of gravity forwards on the transom for improved balance to smoother operation

The engines also offer a user adjustable tilt limit switch to stop the motor tilting past the pre-set limit, two fresh water flush ports are available for easy flushing through of the cooling system after use, even with the boat still in the water, and a three-piece cover gives easy maintenance access to the engine.

Monitor www.suzuki-marine.co.uk for more information and to locate your local Suzuki dealerships.