i have a johnson 150hp 6 cly seized

[clive wood]

i have removed the heads and one piston on either side appears seized on one side of the cylinder, it will not turn over by rocking the crank/flywheel nut, have applied wd40 and oil to all cylinders.
any further ideas would be apprecated.
regards

clive

model No j150tlcur
serial No R7495908

 

[haffiman37]

To dismantle completely, you need to remove the power head from the exhaust housing first.

 

[clive wood]

Hi
we have removed the head, exposing the piston heads. with wd40 have managed to free the top and bottom 2 cylinders leaving the middle 2 still seized.
regards
Clive.

 

[ciscokid]

What ever you do dont beat on them...Keep doing what your doing and slowly get them unseized..