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6V92's TAB lack of RPM

Discussion in 'Engines' started by Robertoman, Aug 30, 2015.

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  1. Capt Ralph, Sep 29, 2015
    #41
    Capt Ralph

    Capt Ralph Senior Member

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    Back to your sea trials vs real life use and original post.
    I can easily imagine a used boat, not much use lately, sitting with a for sale sign on it, going off for a trial and selling.
    Then after a couple of fishing trips, pot holes, waves, rocking; the sediment in the tanks getting tossed up in the fuel.
    Not a big woo, just an extra adventure and hit to the purse.
    You, I and hopefully others have learned something extra.
  2. Capt Ralph, Sep 29, 2015
    #42
    Capt Ralph

    Capt Ralph Senior Member

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    Ouch.
    Sorry to hear about that.

    It does take a bit of pressure to blow out one of those seals.
    I had it happen on a gen-set at start up. Cold oil and a stuck pressure regulator. But it shut itself down.
  3. Capt J, Sep 29, 2015
    #43
    Capt J

    Capt J Senior Member

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    I usually put superlube on the gasket as I find the oil tends to dry after a while. But, the usually don't have to be tightened more than 1/2 a turn after hand tight.....now this depends on how much torque you consider hand tight.....
  4. Robertoman, Sep 29, 2015
    #44
    Robertoman

    Robertoman Member

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    Mr Crapps, You sir, have hit the nail on the head.

    K1W1,Cleaning the fuel was just a little more cost effective than buying new. Not much though.

    Next, I will start talking about a good experience I had with one of the advertisers on this site. But, I think that should be a new topic.
  5. Robertoman, Oct 9, 2015
    #45
    Robertoman

    Robertoman Member

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    Last weekend changed out secondary filters.
    Amazing how much stuff came out of the starboard filter.
    By the way I ran across a sticker that came with the FloScan documentation that says "Coat "O" rings with light to medium grease every filter change."
    Me, not being one to try to out engineer, the highly paid professional engineers. I followed their instructions.
    Added intake silencers to the airsep filters (in stock at Walker, next day delivery!)
    We will see how things run tomorrow.
  6. Robertoman, Oct 16, 2015
    #46
    Robertoman

    Robertoman Member

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    Well I was wrong. I was going thru the engine manuals and found the original engine spec cards/parts card from DD.
    The engines were manufactured by Detroit for Californian Yachts. They are rated marine-maximum 550@ 2300 rpm, not 2350.
    The fuel situation appears to be looking good, for now, no more junk in Racors. The Walker intake silencers did quiet down the intake noises.
    Bottom is pretty dirty again already, the water is still really warm. Last week we tried to burn some more of that cheap fuel and see if we could catch a wahoo.
    No wahoo for us, but the guy in the slip next to us caught an 80 pounder.
    On the way in we had to do the traditional blowing out of the carbon, I always kind of bring them up a little slowly so the carbon doesn't harden up, I know she has to work a little harder going over the hump, but... Topped out a little short of 2000, so a little bottom paint and a little less prop should help that.
    Kind of interesting, both engines seemed to smoke a light even gray smoke at about 1800 rpm (79% load) sustained load and speed, but put to the pins the engines quieted down and made happy sounds and the exhaust was perfectly clear!
    That's all for now, comments welcome always
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