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    1972 100HP V4 Evinrude on old 16' trihull ski boat

    I have a 1972 100HP V4 Evinrude with a trihull 16' small glassmater skiboat from the early 70's era. The motor manual recommends any of a half dozen props, for example 13.25x17, 13x19 or 12.75 x 21 etc.. Will lowering the pitch shorten the time it takes the prop to reach maximum RPM from a...
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    1971 vs 1972 power pak CD amplifier compatibility

    I have a 1972 100HP V4 Evinrude. I notice that the 100HP and 125HP (as well as the 85, 55 and 60HP) models between 68 and 72 seem to use one of two specific power pak models available for that series motor. For example the 1972 100HP uses Sierra 18-5748 where as the 1971 uses 18-5749...
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    Looking for Carb fixed Jet Removal Tool 1972 V4 100HP

    My evinrude manual recommends OMC Special Tool #317002 which is a fixed jet screwdriver for removing the high and low speed jets from the carb. I have a 1972 Evinrude 100HP V4 model 100293 I know it's possible to use a small screw driver to remove the high /low speed jets from the carb, but...
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    Tachometer for 1972 V4 Electric Shift

    Does a 1972 V4 100HP electric shift Evinrude follow the basic tachometer installation principles of other OMC/Johnny/Rude motors - six pulses, with signal from the output of the regulator? I'm familiar with basic tachometer installation, signal, battery and ground wires, and setting the...
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    1972 V4 100HP low speed Idle adjusting screws

    On my 1972 V4 - my carb has 4 screws marked low speed idle adjusting screens located behind the air silencer. I can't find anything mentioned about these 4 adjustment screws in my evinrude service manual. My motor is idling fine, but I'm curious what the correct setting for these 4 screws...
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    V4 100HP 1972 Carb Inlet Question

    I'm removing my high speed inlet screws to clean them out. I have the service manual and it has nice diagrams, but I'm puzzled... the high speed inlet screws are inside a channel, in front of the drain plugs. How exactly do the fixed high speed inlet screws work in that kind of carb...
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    Missing at WOT 1972 100HP V4

    Eliminating the gremlins of this newly acquired 1972 Evinrude V4 100HP electric shift. Starts fine,, smooth idle, runs fine up to around 1500 RPM, if I bring the throttle up, at about the same point each time it will bog down, always at the same point. It doesn't sputter or fight and it...
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    1972 100HP will fire once backwards after cranking

    Have an ignition problem. Motor cranks, and I appear to have some fuel burning in the cylinders, but it won't fire up. When I stop cranking it stops. The good news is I have strong blue spark on all 4cylinders. Fuel is getting to plugs. But when I crank it, I will see a little exhaust...
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    Can high RPM in neutral cause quick overheat

    Johnson 100HP V4 1972 engine had a shorted neutral solenoid. While diagnosing it in the water in somewhat of a frustrated panic, it was in neutral (from forward) and it ran at probably 2000-3000RPM for maybe it seemed up to a minute in neutral and tripped the overheat horn. I realize very...
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    1972 Electric Shift Solenoids question

    My electric shift has forward and reverse but no neutral. I have a Johnson 100HP 100ESL72R I have the service manual and I've done the basic electrical tests to see if my solenoids are getting the right voltage for neutral and reverse. I've verified the shifter provides the correct voltage...
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