MY propellor is too BIG

Discussion in 'Props' started by rich99uk, Jul 23, 2007.

  1. rich99uk
    Joined: Jan 2006
    Posts: 48
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: portsmouth

    rich99uk Junior Member

    I have a 22 foot semi displacment hull fishing boat with a ford transit 2.5 DI (approx 4000 rpm) engine init. with a 3:1 reduction gearbox. Thw boat is a heavy boat. The prop i have at moment is 18 x 12
    At precent I am only getting about 2500 RPM max.
    I was goint to take it and get a inch taking off the diamiter however i still not sure that is going to be enough or even if that would work lol.
    I dont want to get it cut down and balanced then realised i have to take it back off and do it again gets a bit expensive.
    So i though about trimming it down myself gradually then taking it out for test and when i get approx right RPM take it off and get it balanced proffesionally. What does everyone think ??? Any Other Ideas ????
     
    rich99uk, Jul 23, 2007
    #1
  2. Frosty

    Frosty Previous Member

    You need to reduce pitch not dia. Try ringing Lancing marine near you, they may swop or sell you a second hand one.
     
    Frosty, Jul 24, 2007
    #2
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