Thread: Check out this piston wash
05-31-2007, 08:35 PM #1
Check out this piston wash
Ski is a 1200r
Any idea why it looks like this ? 1st pic is #1 cylinder and 2nd pic is #2.
Last edited by mrbtd; 05-31-2007 at 08:35 PM. Reason: spelling
05-31-2007, 08:47 PM #2
Im having trouble reading these, but il take a shot at them, in the first cylinder you appear to be running lean, in the second pic the cylinder looks like it needs to be richend up just a little.
05-31-2007, 08:50 PM #3
05-31-2007, 08:54 PM #4
Thats hot! Give us some details on the setup.
05-31-2007, 09:00 PM #5
thirsty = more fuel right ?
Its a 1200r
135 lb compression
110 pilot 120 main 95g dull spring lows are 7/8 out and the highs are 1 1/8 out
05 pump w 14/20
It will turn 7210 on a cool morning and 7150 - 7160 all day
05-31-2007, 09:02 PM #6
The 14/20 is a big prop for a 1200. You definately are running hot. Try going up a half jet on the mains.
I'd think a boost in compression along with the jetting change would be a great help (and quicker) with your pistonwash.
05-31-2007, 09:10 PM #7
06-01-2007, 05:53 AM #8
06-01-2007, 05:57 AM #9
When doing plug chops I run it for 15-20 sec @ wot then turn it off...Is when the piston wash developed relevant ?
For example - before I turned this off I had a long run @ 5500 - 5800 rpm's (15+miles). Then I had to run it for 10-15 minutes on a broken reed.
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