Photo of Tripp 50 launch

SELECTION
ENGINE
TRANSMISSION
PROPELLER

MINIMUM DIAMETER
Aperture Clearances

PROP DIAMETER
and DoR tables...

GM series
3JH2 - 3JH3 series
4JH2 series
4JH3 series
LH(A) series
LP(A) series
LY(A) series
CX series


The Nav Station...

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Photo of power catamaran

Yanmar Pleasure Boat Marine Engine Help

Propeller Clearances

  • The clearance between the tip of the prop and the hull is "a". You can go down to 10% if you're stuck.
  • The clearance between the rudder and the nearest point of the propeller is "b".
  • The clearance between a full keel and the leading edge of the propeller, measured half way out along the blade from the center of the shaft, is "c".
  • The clearance between the prop strut bearing and the propeller hub is "d".

prop aperture drawing

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