Evinrude Tank

How do i do a tune-up on an outboard motor?

The motor is an older evinrude 140 v4 not sure on the year. This is going to be my first tune up that i have ever done

One of the interesting "marketing" tools for many outboard shops was a "Tune Up Special". In truth since the introduction of fixed jet carburetors and CD ignition systems, there is little to "tune up."

We would routinely change the plugs, and lower unit oil (really just routine maintenance) and put it in the test tank. Check the timing and throttle cam operation. Make sure it ran ok and that was it.

These engines had a bad habit of loosing compression on one cylinder. Most often a ring issue. So, that's a simple compression test. You can do that with the engine still mounted on the boat. It's done by removing one plug at a time and cranking but not starting the engine. You can get a spark checker and connect it to the plug wire to protect the CD ignition. If you have a very low cylinder, you'll need to get it repaired before it fails.

OMC (Evinrude/Johnson). makes a "tune-up in a can". It's really a solvent/oil blend designed to de-carbon the head and free sticking rings. You just follow the instructions on the can. Note this will not fix an engine with cylinder damage.

The service manuals will give you step by step instructions for a "Link-N-Sync" and declining the head. In truth just check out Youtube:

See:https://www.youtube.com/watch?v=1y1X0V9wKx8
See:https://www.youtube.com/watch?v=rtvKZyxbVdg

1950 75 hp evinrude vintage outboard motor gas tank
1950 75 hp evinrude vintage outboard motor gas tank
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772681 Brass Fuel Tank Connector 1 4 NPT for Johnson Evinrude Outboard Motors
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Clean Used 1998 Evinrude 3 Cylinder 35 HP Outboard Oil Tank
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NEW OMC Evinrude Johnson Gas Tank Gasket Set 376455 LOTS More Listed
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1951 Evinrude Fleetwin 75 hp Outboard Portleft side tank bracket front
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New Evinrude Johnson OMC Fuel Tank Indicator Support Screws Pair Part 310849
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Johnson Evinrude OMC BRP VRO 18 gallon oil tank w holder prime bulb line
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NEW IN BOX EVINRUDE JOHNSON BRP 0764274 OIL LEVEL SENSOR KIT 30 GAL TWIN TANKS
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375663 NEW OEM VINTAGE JOHNSON EVINRUDE FUEL TANK FILTER 0375663
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Gas Tank without Cap 1953 Evinrude 75 hp  Model 7512  7513
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NEW Johnson Evinrude Oil Tank Pickup Kit 0176635 0175532
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USED JOHNSON EVINRUDE OMC 375817 FILLER CAP FOR PRESSURIZED FUEL TANK
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USED JOHNSON EVINRUDE OMC 375817 FILLER CAP FOR PRESSURIZED FUEL TANK TALL
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Evinrude Sportwin 25hp 4209 1937 Outboard Tank Support Bracket Exhaust Tube
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Johnson Evinrude 124764 Seal Oil Tank Cover NOS
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admin posted at 2013-5-12 Category: Boat Parts