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The Powerplant
The SR230 is powered by two Yamaha MR-1
engines, a compact, ultra-lightweight, 140 horsepower,
four-cylinder, 988cc, DOHC, 20-valve, liquid-cooled engine
for unequalled performance. Features include:
- Electronic Fuel Injection (EFI) -
Four individually adjustable throttle bodies, throttle
position sensor (TPS) and intake air pressure and air
temperature sensors supply the optimum air/fuel
mixture. The results are a smooth, high power output
with low fuel consumption and low exhaust emissions.
- Specially Designed, One - piece
Cylinder and Crankcase Assembly - Provides
tremendous engine rigidity that's lighter and stiffer
than two-piece designs.
- High Volume Intake Box - With
water repellant air filter and flame arrestors.
- Dry Sump Lubrication - Uses two
engine oil pumps to deliver and return lubricated oil
to each moving part with water-jacketed sump and oil
backflow protection.
- Driveline Reduction Gearbox - Rugged
and efficient straight-cut reduction gear assembly
lowers jet pump shaft speed by a ratio of 1.47:1.
- Yamaha Engine Management System (Y.E.M.S.)
- An integrated, computerized management system that
controls and adjusts such functions as ignition
timing, fuel injection mapping and engine diagnostics.
- Independent Water-jacketed Exhaust
Manifolds with Collector - Achieves high power
while keeping noise and exhaust heat under control.
- Thermostatic and Pressure Controlled
Cooling System - Water flow through the engine is
controlled by a thermostat and pressure system and is
maintained by a pressure control valve.
- Corrosion Protection System -
Sacrificial zinc anodes protect the engine from
harmful galvanic corrosion. Stainless steel fasteners
(nuts, bolts, hardware) provide a long service life.
Cylinders, cases and heads are all treated with a
durable oxide coating to form a barrier between
corrosion and expensive engine parts.
- Electronically Controlled,
Variable Ignition Timing - For exact ignition
advance control at all throttle positions and RPMs.
The Jet Pump Propulsion System
The SR230 twin 155mm Hyper-Flow jet pump
propulsion system with three-blade stainless steel
impeller is designed to maximize water flow for high
performance. The twin pump configuration provides
excellent hook-up and smooth acceleration. Features
include:
- Pumps are Manufactured with YDC30
- A combination of zinc and copper alloys, developed
by Yamaha marine engineers, that offers excellent
corrosion protection.
- Stainless Steel Impeller Housing
Liners - For high durability, the liners maintain
accurate clearance tolerances between the impeller and
the housing.
- High Flow Intake Ducts and Grates
- The dynamic shape of these items directs water flow
into the pump for better thrust, performance and
hook-up.
- Cooling Water Intake Filters -
Filters out harmful debris that could cause blockage
of important cooling water passages.
- Jet Pump Clean-out Plugs with
Push Button - Allows for direct access to the
inlet duct cavity to easily clear any debris from the
pumps from inside the boat.
The Hull and Deck
The SR230 utilizes a deep-V, multi-chine
hull with 20-degree dead rise. The hull and deck are
constructed of multiple layers of fiberglass with sandwich
core construction reinforcements.
The fiberglass liner, which is separately
constructed, represents a revolution in boat design,
combining the floor, stringer, and engine mounting system.
It is constructed from a custom blended polyester resin
with engineered fiberglass laminates and 3/8" 6061-T6
aluminum plate for the engine mounts.
The liner is bonded into the hull with
polyurethane adhesive and then injected with foam to
provide maximum floatation as well as longitudinal and
lateral structural rigidity.
The deck is then fastened to the hull with
both mechanical fasteners and polyurethane adhesive giving
this revolutionary semi-monocoque fiberglass structure
unsurpassed strength and rigidity.
Environmentally-minded
Innovations
By employing proven technologies, Yamaha delivers
significant reductions in emissions output and noise
levels without compromising performance and reliability.
These technologies include:
- Yamaha MR-1 Four-Stroke Engine -
Yamaha's first sport boat four-stroke engine is one of
the cleanest, quietest, most fuel-efficient engines
ever introduced.
- Yamaha Sound Suppression System
- This system of integrated noise reduction components
targets the three common types of noise: 1.) intake
noise, 2.) exhaust noise and 3.) noise from vibration.
Added Features
The SR230 comes with a long list of comfort features that
make it one of the most complete sport boats offered
today. These features include:
- Multiple Storage Compartments
- Fourteen storage compartments include an anchor
storage compartment, storage under each seat and
carpeted compartments under the starboard and port
consoles. The SR230 is also equipped with a full-size
ski locker that accommodates skis, kneeboards or
wakeboards. Two cockpit gunnel inserts provide
additional storage for rear passengers. The convenient
dual glove box is perfect for small items like keys
and sunglasses.
- Innovative Swim Platform - Stern
can be transformed into a private patio on the water
with room for a dinette table.
- Center Walk-Thru Transom - Easy
access to the stern patio area and swim platform from
the cabin.
- Telescoping Re-boarding Ladder -
For easy boarding while in the water.
- Dashboard Controls -
Instrumentation panel includes 4" dual
tachometers, 4" water pressure speedometer,
2" fuel level gauge, low oil level warning light,
low fuel level warning light, dual check engine
lights, dual oil pressure warning lights, blower
switch with breaker, navigation/anchor light switch
with breaker, automatic bilge pump switch with
breaker, interior light switch with breaker, stereo
switch with breaker, horn switch with breaker, dual
ignition switches and two lever throttle control.
- Adjustable Tilt Steering Wheel -
Allows the operator to adjust the angle of the
steering wheel for added comfort.
- Independent, Dual Engine Controls
- Independently adjusts each throttle position. An
independent shifter controls forward, neutral and
reverse.
- Automatic Bilge Pump - Turns on
automatically when water is present.
- Integrated Drink Holders -
Located at all seat locations for easy access for
everyone on board.
- Sound System - Top-of-the-line
JVC AM/FM Radio/CD player and four speakers with
remote control at helm.
- High-quality Trailer - Every
SR230 comes complete with a matching, twin axle
trailer equipped with disc brakes. A galvanized
trailer is available as an option.
Optional Accessories Kit
- Bimini Top - Premium stainless
steel and aluminum construction with Sunbrella
material for better durability.
- Carpet Kit - High-grade removable
Berber carpet.
- Dinette Table with Pedestals -
Removable dinette table …
- Bow Cushion Insert - Cushion
insert transforms the bow seating area into a full
size sun pad.
- Cockpit Cushion Insert -
Cushion insert transforms the cockpit seating area
into a full size sun pad.
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