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    Piston cleaning, too clean??

    The other critical measurement are the cyl liner bores. How is the taper on them? Are they eggs-shaped? Are there any signs of scuffing or vertical scratches that won't hone out? See attached pic of a typical damaged cyl liner.
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    1982 JOHNSON 175 TEMP ISSUES

    That engine should be running thermostats for even cooling throughout the block when planning and at idle. Your engine at idle should be between 143 and 155 when warmed up. As much as 20 degrees or more COOLER at planning speeds, when the thermostat pressure relief valves open up. (also part of...
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    Bubbleback thermostas, bolt broke.

    You'll know if it leaks when you put it back together and run it. When you get the heads off to do the deflectors, you will see how clean (clear of debris) the water passages are around the cyl liners. Make sure the deflectors go back in the correct position-the middle deflector in this picture...
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    General Engine Rebuild Questions

    Likely that cyl has been severely overheated and that would have affected the ringsets. If you look at all 3 pics, you will see the rubber water deflector is in the wrong position. It's completely blocking off water flow to the that side of the block . I'll post a pic of what a "normal"...
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    alternative model/serial number locations, mid 70's evinrude 85? 135?

    Here is a 1975 serial/model tag from the top of the block-usually painted over, this is what it looks like.
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    johnson 115 or 140

    The engine is question is an 83 model, which makes it a crossflow, not a looper. Racerone has the correct info. Back to the original question. It's not unusual for an owner to change cowlings on the crossflow engines. They were the same size for many years. Perhaps his boat was only rated for a...
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    broken rings and water in exhaust chest 1983 115

    Sounds as if you have been diligently cautious with your new powerhead. Have you measured the head temps with a laser temp gun? Just because you have not heard a horn does not mean it's not overheating. Have you torn the carbs apart that feed the two bad cyls? Esp remove the high speed jets and...
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    Model number mismatch??

    Re: Model number mismatch?? The transom bracket is one of two places for the model serial number. Yours indicates a 140 hp. Not unusual for the cowling to get changed over the years, esp, if the boat is rated for a 115 and the owner wanted to disguise that fact for some reasons. The other...
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    Johnson 235 block with 175 carbs

    Re: Johnson 235 block with 175 carbs Thanks for the pics. Looks like you have something else going on inside the block. An internal water leak. A water leak will kill the fire in a cyl, causing it to misfire and run rough-to your earlier complaint about rough running after the first lockup. My...
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    Best shop manual for 1980 Evinrude 175 HP?

    Re: Best shop manual for 1980 Evinrude 175 HP? Look at the casting plug atop the block, over one of the heads. It's probably painted over, but should have the model and serial number. It's the model # you are looking for.
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    1986 110HP Crossflow Help With Stuck Thermostat Needed

    Re: 1986 110HP Crossflow Help With Stuck Thermostat Needed Once side can overheat if the stat sticks shut. I'd probably pull the housing apart and replace both stats, just for good measure. Best not to overheat when 2 miles from the launch ramp. I know these bubble backs are a pain, but it's a...
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    how can i lift an evinrude 90hp. v4. from a boat to my pickup an no lift ring?

    Re: how can i lift an evinrude 90hp. v4. from a boat to my pickup an no lift ring? The factory sells/recommends a 3-legged puller bolted to the flywheel for lifting-somewhat similar to the one pictured above. Theirs has a lifting eye cast into the large center screw of the lifter. (the 3 grade...
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    Johnson 115HP Model Number

    Re: Johnson 115HP Model Number This is the casting plug you are looking for atop the block. They do vary somewhat by year. This one has both the serial and model number. Normally this will match the info on the rivet plate on the transom bracket.
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    1979 Evinrude 85 hp Model # 85999c $800 is this high or low?

    Re: 1979 Evinrude 85 hp Model # 85999c $800 is this high or low? I agree with jimmbo, the cowling is not a 79, but earlier. The 79 cowlings were a later design/appearance. They had gone to the dark blue metallic paint on them in 78 and 79 model years. Both the 77, 78, 79, 80 cowlings used a...
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    What model years were the 100 hp v4 engines?

    Re: What model years were the 100 hp v4 engines? Look for this casting plug on the top of the block. It's painted over, but still there if it's the original powerhead. Has serial and model #'s.
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    115hp Johnson Seahorse...help with apprximate age

    Re: 115hp Johnson Seahorse...help with apprximate age Looks like a 1977. Cowling decal design looks a lot like the factory parts diagram. No power trim. If it had trim-the 77 trim was the old-style which mounted outboard of the transom brackets. You can confirm using boobie's i.d. method. Here...
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    lohnson 140 bubble back on a Johnson 115

    Re: lohnson 140 bubble back on a Johnson 115 Once you acquire the two bubble back exhaust manifolds, you'd need to get the exhaust filler block kit and have it installed in the exhaust chest. Used to be sold by OMC under part number: 392000. (It's obsolete now, but one US dealer still has a new...
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    '73 johnson 135 questions about producing more HP

    Re: '73 johnson 135 questions about producing more HP You have been given some good advice. While true, the 135 is pretty much maxed out on factory hp-those additions you mentioned in your first post will add some hp. Just not much. The V4 140 made 5 hp more to a large extent because of the...
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    1974 Johnson 85hp

    Re: 1974 Johnson 85hp Here is a pic of the Stevens Instrument spark checker, as an example of a simple tester. About $29 retail.
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    1975 Johnson 135 questions

    Re: 1975 Johnson 135 questions There is another/identical serial number stamped on a casting plug on the top of the engine. Likely it's painted over, but has the serial and model number stamped there. It's the model number you are looking for. See pic:
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