J/133 OWNER GUIDE 32
Engine System
The engine and fuel system is engineered to be conveniently accessible for repairs and general
maintenance. Located aft and under the companionway ladder. There is access to the front, sides and
back of the engine from which all important functions can be reached; including water strainer, fuel injectors,
fuel filter, fuel primer, expansion chamber, and alternator.
Before starting the engine read the engine manufacturer’s owner’s manual for proper break-in and
operating procedures. Once the engine is running, inspect it for any discrepancies, like oil leaking,
excessive water leaks, or anything out of the ordinary.
• Engine Control Panel: is mounted aft of the port side of the helmsman’s cockpit. It contains the
starter, kill switch, warning lights, and gauges. The combination throttle/gearshift is mounted aft on
centerline on the aft cockpit wall. Double-check all mechanical connections between engine and on-
deck equipment.
• Engine Bed: is constructed of heavily reinforced fiberglass. This provides a superior mount over wood
and is also rot-proof. The engine sits on Yanmar “soft” rubber shock mounts to help isolate the engine
vibration from the boat. Check to see that the engine is sitting correctly on them and the bolts tightly
secured.
Sail Drive
The J/133 is equipped with the Yanmar Saildrive SD-40. This system provides a clean quiet alternative to
conventional yacht drive trains. We recommend that you follow all Yanmar guidelines included with the
boat for maintenance and service of this system.
• Transmission/Saildrive: is attached to the aft end of the engine and houses the reduction and reverse
gears. These gears generally need little maintenance, but the oil level should be checked periodically.
Fuel System
• Fuel Tank & Hoses: The J/133 is equipped with one 50 gallon fuel tank located under the port settee.
Fuel lines run from the tank to the fuel primer pump. From there fuel flows into the injectors on the
engine. The tank itself is aluminum and baffled to prevent fuel slosh. For a layout, please see the Fuel
System diagram.
• Fuel Gauge: is located near the engine panel recess in the cockpit. The gauge reflects level (height) of
fuel in the primary tank, not the quantity. Try to maintain a minimum level of 1/3 to 1/2 tank filled at all
times.
• Fuel Line Shut-Off Valve: also sits atop the tank. Since diesel engines require bleeding after they
have been deprived of fuel, it’s important that the shut-off valve be in the “ON” position (lever parallel to
piping) anytime the engine is started.
• Fuel Tank Access Plate: is atop the fuel tank and provides access inside to clean the tank or check
the fuel gauge.
Engine Cooling System
The J/133’s engine utilizes both a “closed” cooling system, in which a mixture of fresh water and antifreeze
is circulated within the engine, and a “raw water” system, in which a heat exchanger supplies a constant
flow of outside water, pumped in through the raw-water intake, to cool the coolant mixture.
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