I-4 120 Prop Chart

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1967 Sportsman LDFV  L.Shuster




Last Updated:

22 December 2006

OMC 120-hp I-4 Propeller Application Chart for the  "Electric Stringer Sterndrive"
Note: SST (Stainless Steel Teflon-coated props are only offered in odd-inch pitch sizes. Due to their higher efficiency (thinner, stiffer blades result in less slippage), SST propellers can be substituted for the one-inch lower aluminum (AL) propeller without sacrificing hole-shot thrust. 

Note: 1964 - 1966 I-4 120 must ONLY use 14.25" Diameter ("taper-hub") series to clear exhaust outlet.

Part No Dia Pitch Blades
&
Material
Mfg Approx.
Speed
Range
(MPH)
Type of Boat and
Approx. Length
381296 14.25 10 3-AL OMC

10 - 20 mph

Work Boats and Large House Boats
(non-planing)


    

    

    

    

    

    

    
382676 14.00 11 3-AL OMC 10 - 24 mph Work Boats and Large House Boats
(non-planing)
012089/PR119 14.00 11 3-AL MWC

382017 14.00 12 3-AL OMC 22 - 28 mph 21-ft to 27-ft Cruisers and House Boats
380187 14.25 12 3-AL OMC
012090/PR120 14.00 12 3-AL MWC
172490 14.00 13 3-SST OMC 24 - 31 mph

381185 14.00 14 3-AL OMC 26 - 32 mph 19-ft to 22-ft Runabouts and Cruisers
380074 14.25 14 3-AL OMC
012091/PR121 14.00 14 3-AL MWC
172491 14.00 15 3-SST OMC 29 - 35 mph

381186 14.00 16 3-AL OMC 30 - 36 mph 17-ft to 20-ft Runabouts
380188 14.25 16 3-AL OMC
012092/PR122 14.00 16 3-AL MWC
172492 14.00 17 3-SST OMC 32 - 38 mph

381187 14.00 18 3-AL OMC 33 - 39 mph 16-ft to 18-ft Runabouts
380189 14.25 18 3-AL OMC
012093/PR123 14.00 18 3-AL MWC
172493 14.00 19 3-SST OMC 36 - 41 mph

383287 14.00 20 3-AL OMC 37 - 42 mph 15-ft to 17-ft Light Runabout
379652 14.25 20 3-AL OMC
012094/PR124 14.00 20 3-AL MWC

380190 14.25 22 3-AL OMC 40 -  46 mph 15-ft to 17-ft Light Runabout
 

MWC = Michigan Wheel Corporation