Quote:
Originally Posted by MattMigues
Yesterday I left launch to see about shooting a deer about halfway to my hunting spot my motor felt like it “let go” I could hear a knocking sound that almost sounded like splines on drive shaft may have stripped. I shut motor down trimmed up spun prop pulled pushed and determined the sound was inside the head. Running on 2 cylinders I went to hunting spot, started back up about 4 hours later motor cranked fine lugged to launch. Returning home first thing I did was pull off cowl and look at plugs… Bingo my #2 plug gap had been closed and you can see where something inside cylinder struck it, I haven’t had a chance to pull head off yet but what do you guys think? Maybe a ring that a piece chipped off? I know I’m looking at some $’s… BTW it’s a 2008 50hp TLR Yamaha.
|
I would bet your piston came off the rod on that cylinder.
pull all 4 plugs then stick a screwdriver in the #2 plug hole and turn the flywheel by hand and feel if the piston goes up and down as it should. if its disconnected it wont go down on its own.
a knocking sound is almost always going to be piston or piston rod related.
looking inside the plug hole you might be able to see if there is something on top of the piston but if that were it most likely would jam the piston and seize the motor.
I don't think its going to be a minor problem, that said it may not be too much of an expensive fix if the cylinder wasn't damaged.
01-28-2014, 03:22 PM
Hybrid Mode
