Auxiliary Engines And Related Systems; The Engine; Installation - Tayana 37 Operation & Maintenance Manual

E. AUXILIARY ENGINES AND RELATED SYSTEMS

1. The Engine

Your TAYANA 37 is delivered with a standard Yanmar 3QM30F diesel
engine, the new Yanmar 4JHE diesel, or with an optional Perkins 4-108
diesel. A very small percentage have some other make engine. The
discussion that follows applies to any diesel auxiliary which you selected.
Specific procedures for service and maintenance are found in your engine
manufacturer's handbook, and they should be followed religiously.
Remember, your engine is like-a dog--it thrives on attention and dies quickly
of neglect. A small diesel which is run regularly, serviced faithfully and
cleaned consistently will last 10,000 hours before major maintenance is
required. Think about that!! If you treat your engine right, you'll never have
to buy a new one! Ignore your engine--think about it only when you need it--
and you will find yourself spending about $5,000 every three years or so.
a. Installation
Your engine has been installed by highly experienced mechanics
using the best materials. The mounts are bolted to a glassed
foundation to provide stability and quiet operation. The engine
mounts themselves are of the flexible type to help eliminate
vibration in the hull. The propeller shaft is 1-1/4" stainless steel
which is connected to the transmission by a flexible coupling. The
shaft goes through a bronze shaft log and gland to a cutlass bearing
mounted in a bronze casting outside of the hull. The standard
propeller is a three bladed bronze wheel generally 18" in diameter
with a 12" to 14" pitch.
The exhaust system is of the wet type--that is water is injected into
the gas stream and ejected through a muffler and check valve. See
figure V.-1. This system is common on sailing yachts because the
water cools the exhaust fumes thus cutting down the heat radiated
into the engine spaces and eliminating fire hazards. As can be seen
in the figure, a siphoning break must be installed to prevent water
from backing through the system and into the engine. Newer
TAYANA 37s have exhaust systems made primarily from plastic
(ABS) mufflers and neoprene reinforced hoses. Older yachts have
stainless steel systems composed of an expansion (bellows)
exhaust pipe, jacketed pipe, stainless steel water locks and
V-11