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    1976 40 hp lower unit???

    My lower unit locked up last night, cracked housing and all. <br /><br /> The engine is a 1976 40hp, with the pin drive prop. The lower unit also had the fins out the side of the housing like wings.<br /><br /> Looking for a good used lower unit, newer model with spline drive if it will bolt...
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    Spark plugs fouling

    I have a 1976 evinrude 40 hp. Here lately it has been fouling plugs. Looks to be fuel fouled, and wet. Not carbon fouling.<br /><br /> Been doing alot of idling around watching the fish finder. I believe the plugs I am running are L77JC8.<br /><br /> Is there a hotter plug I can run or one...
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    1976 40 hp, what are these for?

    What are the two small (maybe 1/8") vacumm, vent or fuel lines that run from the front of the powerhead under the carb to the left side of the powerhead and one to each cylinder. On my engine they are clear vinyl looking.<br /><br /> Engine was bogging down a little today and I noticed a small...
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    Wiring ???

    Goin to plan B. The 50 hp bit the dust for now so I dug out the 76 Evinrude 40hp. <br /><br /> I have a large red wire that is obviously the hot wire. <br /><br /> The purple wire with the white stripe goes to the choke.<br /><br /> The white wire is for the starter solenoid.<br /><br /> What do...
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    Need parts

    1971 50 HP Evinrude 50173S<br /> <br />Problem of the week and maybe next couple of months. Boat ran 24 mph this last weekend but was slow getting up. Hard to start, blowing a little fuel out of the top carb into the air silencer. Ran a compression check today and had 45 in the lower cyl and...
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    Carb flooding

    1971 50 hp <br /><br />Another week, another problem. Motor was running fine and started to bog down. Hard to start, used to start with the bump of the key, and dies when idled down. Under the air intake it is fuel washed and oily. I took off the air cover and the top carb has fuel standing in...
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    1971 50 hp, head gasket

    Still looking for the cause of my overheating. I am going to check the compression and am considering a new head gasket. I have already done the impellar and thermostat and still setting off the buzzer. Last weekend removed the thermostat altogether and ran it for the day. Never set off the...
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    71 50 hp overheating

    I have replaced the impellar and thermostat. The water jacket under the cover looked as clean as could be expected when I replaced the thermostat. The pressure relief valve and spring looked to be in good shape. It is getting hot, too hot to hold your hand on. But only getting hot on...
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    1971 50 hp popping fuse

    My 71 Evinrude 50hp is poppin the fuse kinda randomly. This is the starter solenoid fuse I think (located under the hood cowling, the only fuse I have seen). When it blows, the engine has no fire to the starter soleniod. Also, if it is running and the fuse blows, the selectric shift stays in...
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    Aluminum boats and corrosion

    I have a new 1760 aluminum boat I put a 1971 Evinrude 50 on. I accidentally left the key on overnight. It was on the trailer out of the water, but the next morning there was some corrosion spots on the lower unit and a few on the rear of the transom. All wiring is grounded strait to the...
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    Wiring gurus

    I am going to put my 1971 50 HP evinrude on a new 1760 F&F aluminum boat I am having built. My evinrude has console steering and controls so I opted for a center console. This rig will be for duckhunting and rather than look for the keys at 2:00 am I want to wire the ignition to toggles and a...
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    1971 50 HP evinude, performance tips?

    I have read before about changing carbs and such and gaining HP. Is there anything that can be done to improve performance?
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    Tach question

    I have a 1971 Evinrude 50 hp I am fixing to put on an aluminum 1760 semi-V I am having built. I want to add a tach so I can try a few different props. I seen Cabela's has a tach clearanced for 19.99. But it says for 4-6-8 cylinder engines. This won't work for the two cylinder will it? What kind...
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    What Prop, how fast???

    The boat is a 1760 semi V aluminum hull. The motor is a 71 50 HP Evinrude. Now I have a 13 3/4 x 15 prop. I am thinking this will do well duck hunting with a fully loaded boat. Anybody else run a similar rig as to guess speed? And with just me and a fishing pole in the boat, a 17 or 19 shouldn't...
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    1971 Evinrude Selectric impeller replacement

    Well the 50 hp fired right up today with fresh gas and a battery. It hadn't been started in at least 4 years. I picked up an impeller today at lunch and was wondering what I might run into. The parts counter guy told me he thought the wires had a plug where I drop the lower unit. It started and...
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    Motor opinion

    This motor was given to me by my father. Its a 50 HP evinrude and I believe it says "Lark" on the cover. It's gold in color and I believe it to be an early 70's. It ran fine two years ago. I am sure with a new set of plugs and cleaning the carbs it will fire right up. I am concerned about the...
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