07-14-2007, 07:44 PM #1
First ride after rebuild, what do I do next????
Hey all, Hope you are having a great weekend.
I took my SL750 out to the lake today just to test for watertightness (is that a word)
No Leaks, good for me
My ski was dry idle at roughly 3350-3400 RPM
In water with load 1650-1720
Seems to idle ok for about 5 minutes, so I got brave.
PArked the trailer, and went for a slow cruise for about 20 min. Working my way up to about 4000 RPM (reached about 21MPH per the MFD)
Seemed to be a littel rough, but no problem, no stalls.
Pulled it out and took her home.
I am going to pull the plugs and take a look. I will post pics in a few minutes.
Oh, I got a rebuilt SBC crank and it came with breakin oil. so that is what I am using 93 octance unleaded with 40:1 SBC BI oil (no oil pump, triple fuel pump and .5 over new pistons in clean fresh bores.
off to the photo lab
Last edited by seaobin; 07-14-2007 at 07:56 PM.
07-14-2007, 07:58 PM #2
Here are the plugs left to right is Back to Front
07-14-2007, 09:48 PM #3
keep an eye on the front ...it might turn brown..but so far it looks a little lean...
07-20-2007, 10:21 AM #4
Heading out to the lake this afternoon, I will do another 20 min or so slow to finish breaking in the engine (this will be the third ride) Is therre a set hour that is recommended befoer being able to go WOT. I know that on a new ski they recommend the first 10 hours at no more than 4500 RPM and when you buy a car its 1000 miles befoer you play, but what about on a rebuild ski?
07-20-2007, 10:58 AM #5
- Join Date
- Jun 2007
If you have rode it for 20 min, IMO it is broke in. Rings are cheap, just give er'. I get a new sled and pwc every year and break them all in the same, WFO. Never had a sled or pwc blow up, sieze or fall apart yet. The reason I get a new one every year, is that they are wore out litterally. I always buy two strokes. Four stroke motors are a different story.....
07-20-2007, 04:46 PM #6
Thanks for the advice, just got back from taking my 8 yr old on her first WOT Ride on HER new ski. (she can't ride it alone for 8 yrs, but hey, she wants to call it hers, so be it.)
So here goes:
Fired right up with Choke (no primer)
Idle around 1490-1530
5 minutes of just warm up at around 3300 RPM's seems to pull from 2800- to 3500 a little rough and vibrations.
Then holy s&*t . WOT and she was off.
Now I know you guys (and gals) are all speed freaks out there and have skis that will do 80 on a still pond, but I am 240 # (and used to a Kaw. JS550) with a 50# second rider.
Once we had power and RPM s over 3500, she planed off and screamed up to 49.1 MPH (via the tach) at 6070 RPM's with the red light blinking telling me I need fuel (which I know I don't, Bad float valve)
On a SL750, where should my max RPM and top speed be? I seem to remember that I am at or around spec.
We had such a great time doing the father daughter bonding thing. ireally want to say thanks to all of you who have helped me get to this point.
I am going to take pics of the spark pulgs again just to make sure, but I think I am doing good
07-20-2007, 05:00 PM #7
new plug pics
left to right is back to front
after 1 additional hour or riding including some WOT
These are BPR7ES WHICH IS WHAT WERE IN IT WHEN i BOUGHT IT SO THAT IS WHAT I REPLACED WITH. i THINK SOME FOLKS RECOMMEND THE 8 SERIES PLUGS INSTEAD
07-21-2007, 12:36 AM #8
- Join Date
- Oct 2006
- Cleveland OH
They should run around 62-6300 RPM and top out around 54 MPH. You're close. Try getting the third plug to match the other 2, looks a touch on the lean side. Fatten that up a bit and maybe you'll pick up another 100 RPM?
07-21-2007, 07:25 PM #9
Thanks again for all of the help. We took her out today again and my Wife fianlly got to ride it. (she had never been on a ski) they had a blast. I also, have a 5 yr old disabled child, who I think has found a new love.
I could not have done this as easily without all of the great folks here.
Sean, Robin, Alli and Bri
07-21-2007, 07:49 PM #10
Very nice SeanEnjoy the rest of the Summer.
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