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    J15RENM 1992 hot idle

    Is there any truth to the rumor, I was just told, that two different size water pumps were used in this engine? Possibly I was installed with the wrong size at cost of 151 USD to the effect of 215 deg idling temperature. I would hope to get the right stuff from an authorized repair facility...
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    Running hot at troll speed

    I have a 92 15hp J15RENM. I freaked out when it started showing steam when the weather changed so took it to a marine shop. Tech repalced water pump and advised me that the prop shaft was straight. I was concerned because previous owner had hit a log. Tech also stated that I have a very fine...
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    Steaming Exhaust

    I have a '92 15hp Johnson (J15RENM). I have had it for a week. It was preffering to run at higher speed to smooth out, and showed carbon in combustion chambers so I de-carbonized with Seafoam and DeepCreep. I added new L77j4 plugs gapped to .040, re-oriented the low speed needle adj and now...
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    Spark Plugs--conflicting data

    I have the cleanest, preserved '80's Evinrude 4.5hp ever witnessed. It came with .030 over pistons, new hoses, wires, all parts and lables, paint not a smudge or spec of oil on it. But no model/serial tag. The plug wires show a tag reading of L77J4 or M40FFX. It is a type with kill button...
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    propulsion question

    New to boats I am. I have seen a new/used heavy LOWE brand boat for sale. Fishing machine 165-16ft metal, wide "V" with 25hp 4 stroke Mercury. Hull weight is likely to be 955 pounds. Question: is this rig under powered? I think boat is rated to 75hp max.
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