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    Problem with Old Johnson 6hp: has varying r.p.m

    My old 6hp Johnson Seahorse has a problem with varying R.P.M when throttle over 1/2.<br /><br />On lower speed it works fine, but when increases throttle the problem starts.<br /><br />R.P.M is going up and down without misfires.<br />I can also see that speed is going up and down.<br />I don't...
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    Mercury Thunderbolt 20 hp ...

    I've bought an old Mercury Thunderbolt with 20 hp.<br />I don't know what year it is made, so I wonder if anyone know how I can get get that information.<br /><br />I also wonder if it really should be "grease" in the gear.<br />I can only find 1 hole to fill it up, and it looks like there is...
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    Johnson 6 hp, idling rpm when throttle over 3/4

    I have a problem with idling rpm when throttle is over 3/4. There is no other problem with the engine. Everything else is working fine. Does anyone know what the problem might be?<br /><br />/ Charles
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