Thread: My piston wash
07-20-2008, 05:44 PM #1
My piston wash
Here is the piston wash from my boats maiden voyage. IMO, the PTO looks good, and the CENTER & MAG look a little on the fat side. I turned in the MAG main jet 1/4 turn and the CENTER main jet a 1/8 turn.
What do you guys think?
Plugs (from rear to front; not the greatest pic):
07-20-2008, 06:09 PM #2
Looks safe sometimes it takes some more time to get the hole picture. For now it looks good.
07-20-2008, 06:09 PM #3
How much time do these have on them again?
07-20-2008, 06:12 PM #4
- Join Date
- Aug 2006
07-20-2008, 06:20 PM #5
I'd try 1/16 and 1/8, if it's still too rich then go the last 1/16 and 1/8 turn.
07-20-2008, 06:21 PM #6
That was roughly 1/2 hour of riding. Mostly it was moderate throttle but a few WOT runs. Like I mentioned in my other thread, it ran real strong. I guess I'll put some more hours on it and recheck.
So Beer, when are we doing some riding?
08-11-2008, 07:38 AM #7
*Just a quick update*
Me and Beerdart went riding yesterday and put some serious miles on our boats; this was the first time I've ever had to switch fuel over to reserve from a full tank. The boats ran fantastic all day. That GPR pulls hard! I was able to get some numbers... 52.5MPH out of my little 750. If it was on a smoother surface I'm sure I could break 53. With a smoother plate, maybe even a little more.
- 0.75mm bored 750 cylinders
- Sharp's Marine recreaction porting
- cut heads
- Fuel system upgrade
- Extended pump with 4* wedge & 15/20 prop
- O/P ride plate
- Stock grate
- No sponsons, but need them bad.
- UMI Steering
08-11-2008, 08:48 AM #8
Nice SC, the sponsons will sure feel better for straight line tracking and cornering. Did you check your wash after the long ride and did you make any changes?
08-11-2008, 09:06 AM #9
I pulled the heads after my second run out on the new engine (not pictured) and everything still looked good. I fattened them up just a tad to be safe; better rich than lean. After work today I'll pull the heads for another inspection and if it checks out I think it'll be ready for just add fuel and ride. It is definitely a very healthy & stout setup for this boat.
08-11-2008, 09:13 AM #10
Richer is safer, especially if you don't lose RPM's.
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