INSTALLING ENGINE AND DRIVE UNIT
ZT350 Installation Manual
4-3
Positioning the Drive Unit
12/05
© 2007 Yanmar Marine International
Before reviewing the Installing Engine and Drive
Unit section, review
.
POSITIONING THE DRIVE UNIT
Locating the Crankshaft Vertical
Centerline - Single Engine
Installation
If the crankshaft vertical centerline is not already
marked by the vessel manufacturer, locate and
mark the vertical centerline on the transom in
accordance with the following steps and methods:
Use a large compass to locate the vertical
centerline.
1. Mark identical locations on each side of the
boat 305 mm (12 in.) from the bottom of the
hull.
2. Position the fixed end of a compass at the
marks and draw arcs on the transom.
3. Draw the crankshaft vertical centerline through
the intersection points of the two arcs.
Figure 4-1
Figure 4-1
1 – 305 mm (12 in.)
2 – Identical Side Marks
3 – Compass Arc
4 – Arc Intersection Points
5 – Crankshaft Vertical Centerline
Locating the Crankshaft Vertical
Centerline - Dual Engine Installation
Locate and mark the transom vertical centerline
(See Locating the Crankshaft Vertical Centerline -
Single Engine Installation on page 4-3)
NOTICE: The minimum distance between the
crankshaft vertical centerlines for dual side-by-side
applications is 838 mm (33 in.).
1. Make a set of marks equal to 1/2 the minimum
distance 419 mm (16.5 in.) on both sides of the
transom vertical centerline.
2. Draw the two crankshaft vertical centerlines
through the intersection of the marks.
Figure 4-2
Figure 4-2
1 – 1/2 minimum distance between the
crankshaft centerlines.
2 – Transom Vertical Centerline
3 – Dual Engine Crankshaft Vertical Centerlines
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