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    Evinrude 40HP Lurching after 5 mins of WOT

    Hi, I am having a bit of a mystery problem. So we have dual Evinrude 1996 40HP on a 20FT aquasport, 15 and 17 inch pitch props. randomly last summer they just started lurching at WOT, after about 30 seconds, so this year i cleaned all the carbs, replaced all hoses, tested different tanks, and...
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    1993 40HP only working with primer, mystery problem

    Hi, I have a 1993 40HP and it will run with primer pressed over and over, or if i hold my 2 hands over heads Carb air intake and constrict airflow; but otherwise I cannot get it to run. I have tried different carbs, I have a few sets of these same engines, I have 2 fuel pumps, I tested...
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    2 line vs 3 line fuel pump understanding.

    1 - Fuel In 2 - Pulse Limiter Hose 3 - Fuel Out 4 - Back side of fuel pump crankshaft suction hole (not shown in photo) Hi, I am trying to understand the difference in how these fuel pumps work along with the motor. My first question is: I have a 1985's Evinrude and it has the bottom fuel pump...
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    Evinrude controller buzzer troubleshooting? please help

    Hi, I have wired a minor engine control tester. Everything works fine, the gauges, trim, however I cannot get this buzzer to work, and I am not 100% sure what causes that short "BEEP" when you turn the key 1 position. 1 - so based on the wiring diagram the buzzer is connected to a ground that...
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    3 questions about powerhead disassembly

    Hi, i took apart the powerhead of a 40HP 1990' Evinrude. I had a few questions: 1 - I noticed each side of the crank shaft had holes on the shaft and cover. I made a circles in red around them. I am trying to understand what these holes are for and why each side has them. They seem like some...
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    Rectifier from 4amp vs 12amp evinrude? can I use either?

    Hi, I have a few 40HP ourboards. The ones with powertrim all have the large square rectifier, and the ones with tilt assist 4amp systems have the circular one. Would it be ok for me to replace the square one with the circular one on the 12amp power trim system or would these be an issue? I am...
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    Understanding Evinrude Carb Differences

    Hi, I have 2 1990's Evinrude 40HP motors, however they seem to have slightly different carb designs. I am trying to understand exactly what the difference is, and what the best way to tune them is. A few questions: #'s show in images 1. Both carbs have the, #1 and #2 primer fuel line and...
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    Replace VRO with FUEL pump quick question.

    Hi, I am replacing my VRO with a Fuel pump. Its a 1 line Fuel pump so 1, line for fuel in and 1 line for fuel out. The little hole on the back of the fuel pump goes to the hole behind the mount where the crankcase is to provide suction. Now I have everything pretty much installed but I am not...
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    Boat trailer Hub selection help - purchased wrong hub

    Hi, I am trying to fix my boat trailer wheel. I purchased a 1inch hub - which is the diameter of my axe. I started to put it on and noticed that it would not go all the way in and that the hub was much too wide for the axle end. However, the old hub is also this wide but it kinda went over the...
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