Comprop

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COMPOSITE MARINE PROPELLERS, INC.

Comprop PropellerThe COMPROP was introduced over 25 years ago as a three-blade design intended as an inexpensive “get-home” spare wheel. 15 years ago COMPROP was redesigned as a primary-use, four-blade propeller, and it will be offered by Regal, Wellcraft and Corona as the original-equipment propeller on a limited number of new boats.

 One such boat is the Regal 202SE. To see how the COMPROP stacks up against the aluminum alternative offered by Regal on this boat, we headed to the boat-builder’s test center in Orlando.

The COMPROP can handle up to 200hp (outboard or stern drive) aboard boats as big as 21′ and/or 3,000 pounds. Our 19’10″ bowrider test boat, with its 180-hp MerCruiser 4.3LX V-6 engine and an Alpha One outdrive, fit those parameters easily.

 COMPROP has a 13 1/2″ diameter, and it’s offered with 18″, 20″ and 22″ pitch. Composite Marine Propellers, which manufactures the COMPROP, says changing from three blades to four smaller blades spreads the load out over more area, eliminating the excessive blade flexing that hampered the performance of earlier models. CMP says the COMPROP blades now flex about as much as an aluminum prop’s blades.

 CMP refuses to divulge the exact material used in the prop, other than to say it’s a composite. It’s very light—the 22″ model weighs just 2.5 pounds, compared to 4 pounds for an equivalent aluminum prop. The entire prop is one piece, with splines for the prop shaft molded into the hub. There’s no rubber hub cushion.

 The alternative offered by Regal on this boat is that long-time favorite, a three-blade Quicksilver aluminum prop with a machined spline insert and a rubber hub. In our test, the aluminum propeller showed the strongest midrange speeds while the COMPROP provided the quickest acceleration—as would be expected of a four-blade prop—and top speed.

The cost (or even possibility) of repairs, of course, is determined by the extent of the damage to the propeller. Perhaps the COMPROP’s strongest feature is its price. The 22″-pitch COMPROP lists for $94.95, compared to $140.75 for the Quicksilver aluminum prop.

Propellers

Evinrude/Johnson/OMC

HPPart #SizeSpline
20-35O442110.5 x 1114
O442310 x 13
14
45-140O434513.5 x 1513
O434712.8 x 1713
O434912 . 9 x 1913
150+O455813.7 x 1815
O455013.6 x 2015
O455213.5 x 2215

Mercury/Mariner/Mercruiser

HPPart #SizeSpline
18-25M402110.5 x 1110
M402310 x 1310
30-70M432110.5 x 1113
M432310 x 1313
60-140M454513.5 x 1515
M454712.8 x 1715
M454912.7 x 1915
150+M455813.7 x 1815
M455013.6 x 2015
M455213.5 x 2215

Suzuki

HPPart #SizeSpline
40 - 50M432110.5 x 1113
M432310 x 1313
75 - 140O434513.5 x 1513
O434712.8 x 1713
O434912.7 x 1913
150+M455813.7 x 1815
M455013.6 x 2015
M455213.5 x 2215

Force

HPPart #SizeSpline
25M402110.5 x 1110
M402310 x 1310
70 - 75M432110.5 x 1113
M432310 x 1313
80 - 125F454513.5 x 1515
F454712.8 x 1715
F454912.7 x 1915
90 - 150M454513.5 x 1515
M454712.8 x 1715
M454912.7 x 1915

Honda

HPPart #SizeSpline
35 - 50M432110.5 x 1113
M432310 x 1313
75 - 130M454513.5 x 1515
M454712.8 x 1515
M454912.7 x 1915

Yamaha

HPPart #SizeSpline
25 - 30Y402110.5 x 1110
Y402310 x 1310
40 - 55M432110.5 x 1113
M432310 x 1313
60 -140M454513.5 x 1515
M454712.8 x 1715
M454912.7 x 1915
150+M455813.7 x 1815
M455013.6 x 2015
M455213.5 x 2215

Nissan / Tohatsu

HPPart #SizeSpline
35 - 50M432110.5 x 1113
M432310 x 1313
70 - 140F454513.5 x 1515
F454712.8 x 1715
F454912.7 x 1915

Volvo Penta (SX Drive Only)

HPPart # SizeSpline
V495813.7 x 1819
V495013.6 x 2019
V495213.5 x 2219

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