Mercury 8.1S Horizon, Product Applications Manual

Page: 89 / 163

Exhaust System
Page 6A-20 90-863758060 AUGUST 2006
Loading the Boat—Without a Capacity Plate
For boats that do not display a capacity plate, the number of persons to be loaded onto the
boat for measuring purposes is the number of persons that can sit on designated seating
excluding cabin space. An additional weight of 25 lb. per person is to be added to the boat
before loading passenger weight onto the boat.
IMPORTANT: Use 20 inches for average passenger seat width when measuring bench
seating. Round up or down at 0.5 to obtain a whole person. See the examples below.
• 48 in. (bench seat length) ÷ 20 in. (seat width) = 2.4 persons. 2.4 persons rounded
down = 2 persons.
• 55 in. (bench seat length) ÷ 20 in. (seat width) = 2.75 persons. 2.75 persons rounded
up = 3 persons.
1. Total number of persons that can sit on designated seating excluding cabin space ×
MerCruiser person weight = maximum passenger load for measurement.
•
Number of persons × 165 lb. (MerCruiser person weight) = XXXX lb. maximum
passenger load.
2. Maximum passenger load from the calculation above – swim platform load if applicable.
3. Divide the weight by 165 lb. per person. This gives the number of 165‑lb. persons to
load onto the boat. Round up to next whole number. See
Example 3
.
IMPORTANT: To account for cargo, add a weight of 25 lb. per person to the boat before
loading passenger weight onto the boat.
4. Calculate the cargo by multiplying 25 lb. by the number of persons that can sit on
designated seating excluding cabin space. See
Example
.
5. Load the cargo onto the boat. Distribute cargo as described below.
IMPORTANT: If the boat configuration does not allow for aft, center, and bow storage,
choose the storage application from the Optional Cargo Distribution table that best applies
to your boat configuration.
Preferred Cargo Distribution
Aft storage Center storage Bow storage
25% 50% 25%
Optional Cargo Distribution
Aft storage Center storage Bow storage
25% 75% None
None 75% 25%
50% None 50%
None 100% None
100% None None
None None 100%
6. Perform the first measurement with the swim platform loaded and the person
measuring the waterline on the boat.
7. Load the swim platform if equipped.
8. Measure the exhaust elbow waterline height.
IMPORTANT: View all boat seating as rows that are parallel to the transom of the boat.
9. Load a person weight into a seat, and measure the exhaust elbow waterline height after
each person weight is loaded onto the boat. Repeat until a person weight is is loaded
into each seat in that row.