342 with 5.7 and bravo III

yetiyeti Posts: 59 ✭✭
edited July 2016 in Engine Discussions
From one weekend to next, top speed goes from 37 to 30.  Seems to have no get up and go, can hardly get on plane.  Bilge is empty of water.  New plugs and caps.  No vibration of note to lead me to believe the props are damaged.  Seems to be able to get no more than 4200 rpms out of port engine.  Considering 1) damaged prop (floats so I cant see it) 2) water logged hull (11 years old)  3) fouled bottom (painted every three years)  What am I not thinking of??
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Comments

  • 212rowboat212rowboat Posts: 2,593 ✭✭✭✭✭
    fuel filter, air filter, fuel pump... 
    click here for faults (BEEP) list
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  • raybo3raybo3 Posts: 5,614 admin
    Sounds like the bottom could be getting growth on it. Doesn't take much. How old is the gas? Gas filters? 
    2002 342 Fiesta Vee PC Point Of Pines YC Revere MA. popyc.org     raybo3@live.com
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  • yetiyeti Posts: 59 ✭✭

    Gas is new, fuel water separators are probably 3-4 years.  Fuel filters never changed that I can recall.  Not sure where they are?

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  • LaReaLaRea Posts: 8,069 mod
    That sort of "sudden onset" problem doesn't sound like bottom growth or water-logged hull.  Maybe a stick or other debris jammed in a trim tab or outdrive?  Line fouled in the prop?
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  • Black_DiamondBlack_Diamond Posts: 5,439 ✭✭✭✭✭
    Forsure change the fuel water filters. The fuel filter is in-line and should both be mounted on the firewall. 

    Clean the spark arrestors too. 

    A damaged prop would not limit engine rpm. Are your tachs working?  The Faria tachs are rather unreliable fellas. 

    Past owner of a 2003 342FV
    PC BYC, Holland, MI
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  • bottomlinebottomline Posts: 19 ✭
     same happened to my 6.2 port engine ,turned out to be wires
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  • J3ffJ3ff Posts: 4,229 ✭✭✭✭✭
    you said 37, to 30 new plugs and caps... so it was 37 and you put new stuff in and now it's 30? If that's the case put the old stuff back in! :) 
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