Home › Forum › Ask A Member › 1953 Johnson 25HP › Re: 1953 Johnson 25HP
my really bad stuck 9.5 took a good 3 weeks to free up but proceed as per your gut feel,
1- took out the cyl head …
2- both cyl were half way…so I spread in some penetrating oil
3- waited few days and tried to rotate the flywheel ….. nothing moved 🙁
4- added more juice and repeated flywheel moves back and forth every few days for weeks
5- after a few weeks got the big fellow out and used a 1.5 inch x 12 inch round peg to alternately & gently smack the pistons..and added juice
6- after a few days the "marked" flywheel moved a few degrees 😀
7-continue with the big guy and alternately wacked the pistons each time seeing a few degrees rotation on the fw and adding juice
8- one day….happiness …total movement 😀 😀
9- reinstalled the cyl head…. compression was low 70’s
runs great next to my 75 ETEC
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