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  1. M

    Carb Spitting at below 2200RPM ?cause

    I have a 1977 Merc 700 EL (70HP). It doesn't like to idle, indeed it doesn't like to go below 900 revs at this level it gets variable and sooner rather than later cuts out, the WOT is low aswell (but this could be prop pitch etc - dealt with elsewhere). The spark, Carb and fuel pump issues...
  2. M

    Is the Max rev the Max

    I have a 1977 700Merc EL. I am wanting to know if I can increase the maximum throttle without problems. I have the riight prop for the boat with a nice smooth take off and the trim is also optimum, the only problem is that it tops out at 4000rpm when it is rated to top out at 5000-5500, when I...
  3. M

    A badly scored bore in a 1983 evinrude 50

    From a combination of fiddling without knowledge and forgetfulness we have ended up with a burnt piston and a badly scored bore, in one of the two cylinders, the really cutting thing is that the rest of the engine is perfect, the top cylinder has 150PSI. Qu 1. Is it possible to rebore the engine...
  4. M

    Poor starter, variable idle

    I have a 1977 Merc 700 EL (70HP). It doesn't want to start unless I put some petrol into both carburettors, once started it runs fine at mid and high rev's, however on approaching idle speeds the rev rate gets variable and eventually it cuts out. The engine sometimes restarts okay when warm...
  5. M

    Mercury 70HP ?Year ?Chemical Flush

    Just got a 3 cylinder 70HP Mercury which looks in fabulous condition, unsure of age serial no. 9197359. What is the fuel to oil ratio. Our last engine (evinrude 50 '83') burnt a piston and scored a bore as the local water channels were blocked, this was the bottom of two pistons - the other...
  6. M

    Advice on prop choice

    I have a 16'9" Wilson Flyer daytrip fishing dory (fibreglass) which has a 1983 50hp evinrude short leg outboard. The current propeller is badly grazed. I want to get the boat up on the plane quickly and optomise fuel efficiency. I do not have a tachometer so cannot give you a wot etc. Can you...
  7. M

    Engine ID and Fuel Problem?

    I have just purchased a 17ft day-fisher Dory type. It came with two engines an evinrude 50hp (model no e50belcta; serial no. b004108) and a evinrude 4hp (model no:be4brcde; serial no. b0033017)<br /><br />First question is what are the years of these engines?<br />Second - the 4hp motor start...
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