eavega
Lieutenant
- Joined
- Apr 29, 2008
- Messages
- 1,377
First of all, Hi! I'm new to the forum. I have already been lurking here for a bit gathering some information for rehab-ing a Johnson 1960 10 HP outboard (QD 21) I happened across. Thanks for the answers already provided, and thanks in advance for future information.
My question; so, I got this motor from a guy who said he was going to take it on as a project over the winter, but found that he had no time to dedicate to it now that spring is here. The most glaring evidence that he had at least started to do something was that there were brand new spark plugs in the motor. Now, mind you, these spark plugs were BRAND NEW, no residue or deposits of ANY kind on them I pulled on the pull starter once or twice with not a lot of force just to make sure that the engine was not frozen (which it wasn't), then I pulled the plugs and noticed that the side electrode was mashed right onto the center electrode. I looked inside the cylinder, and noticed that the piston was scratched where it had probably hit the spark plug and mashed the side electrode down. I checked online to see the specs on the recommended plugs for this motor and sure enough they were the wrong ones; these had a reach of 1/2" while the recommended plug for this motor should have a reach of 3/8". So, did I do any damage to the piston if the engine was not actually run? Like I said, the top of the piston visible through the cylinder head was only slightly scratched, but it was scratched some.
-E
My question; so, I got this motor from a guy who said he was going to take it on as a project over the winter, but found that he had no time to dedicate to it now that spring is here. The most glaring evidence that he had at least started to do something was that there were brand new spark plugs in the motor. Now, mind you, these spark plugs were BRAND NEW, no residue or deposits of ANY kind on them I pulled on the pull starter once or twice with not a lot of force just to make sure that the engine was not frozen (which it wasn't), then I pulled the plugs and noticed that the side electrode was mashed right onto the center electrode. I looked inside the cylinder, and noticed that the piston was scratched where it had probably hit the spark plug and mashed the side electrode down. I checked online to see the specs on the recommended plugs for this motor and sure enough they were the wrong ones; these had a reach of 1/2" while the recommended plug for this motor should have a reach of 3/8". So, did I do any damage to the piston if the engine was not actually run? Like I said, the top of the piston visible through the cylinder head was only slightly scratched, but it was scratched some.
-E
