Northern Lights LUGGER L6108, Operator'S Manual

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O6108 08/01
Boat Speed
Medium Duty Rating, 370 fl ywheel HP at 2600 RPM
Knots 1:1 1.5:1 1.75 & 1.86:1 2:1 2.5:1 3:1
9 - 11 – – – – 30 x 14 34 x 16
10 - 13 – – – 27 x 14 30 x 18 34 x 21
13 - 15 – 23 x 14 25 x 16 27 x 17 30 x 22 34 x 26
15 - 18 18 x 10 23 x 16 25 x 18 27 x 22 30 x 26 34 x 31
18 - 21 18 x 12 23 x 18 25 x 22 27 x 25 30 x 30 34 x 36
21 - 24 18 x 14 23 x 21 25 x 24 27 x 28 30 x 34 –
24 - 27 18 x 16 23 x 24 25 x 26 27 x 31 – –
27 - 30 18 x 18 23 x 27 25 x 30 27 x 34 – –
30 - 33 – 23 x 30 – – – –
Shaft RPM 2600 1733 1485/ 1397 1300 1040 866
Shaft Dia. in. 1.5 1.5 1.75 1.75 2.0 2.25
Boat Speed
Continuous Duty Rating, 300 fl ywheel HP at 2300 RPM
Knots 1:1 1.5:1 2:1 2.5:1 3:1 3.8:1
9 - 11 – – – 32 x 18 36 x 24 40 x 26
10 - 13 – – 28 x 18 32 x 22 36 x 28 40 x 30
13 - 15 – 23 x 15 28 x 21 32 x 24 36 x 32 40 x 34
15 - 18 18 x 13 23 x 18 28 x 25 32 x 30 36 x 37 –
18 - 21 18 x 15 23 x 21 28 x 28 32 x 35 36 x 43 –
21 - 24 18 x 17 23 x 23 28 x 32 32 x 39 – –
24 - 27 18 x 19 23 x 26 28 x 35 – – –
Shaft RPM 2300 1533 1150 920 766 605
Shaft Dia. in. 1.5 1.5 1.75 2.25 2.5 3.0
Use this chart to fi nd aproximate propeller sizes for boats
with single engine using a three blade propeller and gears
with a 3% loss factor.
NOTE: Prop size is infl uenced by many factors (hull
design, load, boat use). It is impossible to make an abso-
lute recommendation. For more accurate recommenda-
tions, contact your dealer.
1) Find the boat speed your boat builder expects from an
engine of this horsepower in the left column.
2) Locate the gear ratio desired on the top line.
3) Find where two columns intersect for an approximate
propeller size. See the column bottom for shaft
RPM and shaft diameter.
Example: 410 HP rating; 20 knot boat with 2:1 gear
needs a 27 x 25 three blade propeller.
25
Boat Speed
High Output Rating, 410 fl ywheel HP at 2700 RPM
Knots 1:1 1.5:1 1.75 &1.86:1 2:1 2.5:1 3:1
9 - 11 – – – – 32 x 14 35 x 16
10 - 13 – – – 27 x 14 32 x 18 35 x 21
13 - 15 – 23 x 14 25 x 16 27 x 17 32 x 22 35 x 26
15 - 18 18 x 10 23 x 16 25 x 18 27 x 22 32 x 26 35 x 31
18 - 21 18 x 12 23 x 18 25 x 22 27 x 25 32 x 30 35 x 36
21 - 24 18 x 14 23 x 21 25 x 24 27 x 28 32 x 34 35 x 41
24 - 27 18 x 16 23 x 24 25 x 26 27 x 31 – –
27 - 30 18 x 18 23 x 27 25 x 30 27 x 34 – –
30 - 33 18 x 20 23 x 30 25 x 34 – – –
Shaft RPM 2700 1800 1542/ 1451 1350 1080 900
Shaft Dia. in. 1.5 1.5 1.75 1.75 2.0 2.5
Three Bladed Propeller Sizing Chart