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  1. R

    2003 Johnson 70 temporary power loss

    I bought a 24' pontoon last April with a 2003 Johnson 70 4 stroke with fuel injection. About 15 minutes after putting it into the water the check engine light came on indicating an overheating issue but temp gauge was fine and engine felt normal. It worked perfect for 2 months and that CEL never...
  2. R

    2003 johnson 70hp 4 stroke loss of power

    This is a new to me boat. I've had it since May and it has always started fine, idled fine and ran fine. Last weekend, with a very full boat running at full throttle, it would drop from 5500 rpm's to 4500 rpm's with a detectable sound change like it had dropped from 3 cylinders to 2 then back up...
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