INSTALLATION MANUAL
90-864198020 Page 29 of 77
Measurement Methods
STRAIGHT EDGE METHOD
1. Place a straight edge across boat.
2. With the straight edge above the engine and parallel to the water, measure the distances
between the straight edge and the top of the exhaust elbow.
3. With the straight edge above the engine and parallel to the water measure the distance
between the straight edge and the outside waterline.
4. The difference between these two measurements is the exhaust elbow height above the
water line. Refer to Measuring Procedure and compare measurement to Mercury
MerCruiser’s specifications.
72700
b
c
d
a
e
76859
a-Waterline
b-Top Of Exhaust Elbow
c-Straight Edge
d-Measurement Between Straight Edge And Top Of Exhaust Elbow
e-Measurement Between Straight Edge And Water Line