- Joined
- Jul 18, 2011
- Messages
- 18,285
The engine for my boat has been sitting in the garage anxiously waiting for completion of the stringer & bulkhead repairs.
Just a little background . . . I did a teardown and valve job on the engine last Fall and put it all back together and ran it a few times. Only then to find structural issues in the boat that needed repair.
Link: http://www.tpenfield.com/Formula242/...d_Rebuild.html
So, today, I thought that I would wake it up from its winter nap (I guess you could call that 'Summerize' ???). I shot some fogging oil into the cylinders and cranked it for a while to prime the oil and the fuel. Then I put the spark plugs in and fired it up.
I took a few videos of it running . . . I think it has a cylinder that is misfiring, but I'm not sure. Maybe some new spark plugs are in order. I don't think I have ever given it new spark plugs . . .
Then I did a cylinder leak test, which I had not done last Fall . . . I only did a compression test back then.
So here is a picture of doing the leak test . . .
I recorded the readings as I went using my iPad (I knew that thing would come in handy)
Here are the results:
Cylinder / Leak Percentage
________________________________
Left 1 = 8%
Left 3 = 1%
Left 5 = 1%
Left 7 = 3%
Right 2 = 6%
Right 4 = 6%
Right 6 = 2%
Right 8 = 6%
_________________________________
I was OK with these numbers, because before the valve job, I was looking at as much as 50% leak on some of the cylinders. These numbers, being under 10% are really good. So, I am looking forward to renewed horsepower and speed this summer. We will have to see how that goes !!!
I also found a valve cover bolt that was loose, so I'll have to tighten that up before it goes back in the boat.
Just a little background . . . I did a teardown and valve job on the engine last Fall and put it all back together and ran it a few times. Only then to find structural issues in the boat that needed repair.
Link: http://www.tpenfield.com/Formula242/...d_Rebuild.html
So, today, I thought that I would wake it up from its winter nap (I guess you could call that 'Summerize' ???). I shot some fogging oil into the cylinders and cranked it for a while to prime the oil and the fuel. Then I put the spark plugs in and fired it up.
I took a few videos of it running . . . I think it has a cylinder that is misfiring, but I'm not sure. Maybe some new spark plugs are in order. I don't think I have ever given it new spark plugs . . .
Then I did a cylinder leak test, which I had not done last Fall . . . I only did a compression test back then.
So here is a picture of doing the leak test . . .
I recorded the readings as I went using my iPad (I knew that thing would come in handy)
Here are the results:
Cylinder / Leak Percentage
________________________________
Left 1 = 8%
Left 3 = 1%
Left 5 = 1%
Left 7 = 3%
Right 2 = 6%
Right 4 = 6%
Right 6 = 2%
Right 8 = 6%
_________________________________
I was OK with these numbers, because before the valve job, I was looking at as much as 50% leak on some of the cylinders. These numbers, being under 10% are really good. So, I am looking forward to renewed horsepower and speed this summer. We will have to see how that goes !!!
I also found a valve cover bolt that was loose, so I'll have to tighten that up before it goes back in the boat.
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