Mercury OptiMax 250 Service Manual

INSTALLATION
Page 1D-10 90-888438 JUNE 2002
Mercury Jet Drive Hull Dimensions
HULL OPENING
The pump to powerhead opening in the hull is the most important factor to consider in a Jet
Drive installation. There are four areas of concern:
1. Location (a) of the pump to powerhead hull opening relative to the boat bottom for proper
ride plate seal fit.
2. Dimensional control of the opening - corner radii (b), straightness (c) and size (d) for
proper grommet installation, and corner radii (e) for ride plate seal fit.
3. Flatness and thickness of the area around the hull opening for proper grommet sealing
(see drawing on next page).
4. The hull opening must have a 0.125 inch radius on both the top and bottom corners all
around the opening.
1 1/16 +/– 1/16
3/4 +/– 1/16
7.04 +/– .03
16.48 +/– .06
14 11/16 +/– 1/16
14 5/16 +/– 1/16
2 9/16 +/– 1/16
12 1/8 +/– 1/16
3 13/16 +/– 1/16
3 5/8 +/– 1/16
b and e – Corner Radii
c and d - Size and Straightness
a - Location
Tunnel Dimensions (in inches)
a
b
c
e
a
a
d
c
d
28249
3.94  .06
a

Mercury OptiMax 250 Specifications

General

Brand	Mercury
Model	OptiMax 250
Category	Outboard Motor
Language	English