First ride after rebuild, what do I do next????

[seaobin]

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

Sean

[seaobin]

Here are the plugs left to right is Back to Front

[rgard32]

keep an eye on the front ...it might turn brown..but so far it looks a little lean...

[seaobin]

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?

Thanks

[Dave]

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.....

[seaobin]

Dave,

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

Thanks Again

Sean

[seaobin]

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

THANKS

sEAN

[xlint89]

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?

[seaobin]

Everyone,

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

[beerdart]

Very nice SeanEnjoy the rest of the Summer.