Bonmotwang
Well-Known Member
Do I need to worry about the set screws!
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2001 Seadoo Sportster LE. Just got it!
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Waterluvr
New Member
Do you mean the adjustment that allows the throttle to remain in the position you set it to so you can drive with both hands or the carbs settings?
I wouldn't worry about it at all right now if the former, so long as your throttle response is crisp don't sweat the carbs either right now.
Bonmotwang
Well-Known Member
There is some soft popping sound from the engine at 3000 Rpm. Every a few seconds.
2000 has no poping.
2000 has no poping.
Bonmotwang
Well-Known Member
I meant low speed high speed screws. Do I know too lean too rich?
Waterluvr
New Member
Golden rule, adjust them rich and then lean them back out the other way slowly with small adjustments followed by a period of operating the motor until you get it running right.
The high circuits call for closed on your's right? Remember the high side combines fuel from the low circuit as part of the total fuel input to the cylinder at higher rpm's so don't be afraid to try different settings with those low adjusters.
Bonmotwang
Well-Known Member
The manual says low 1.5 turn out. High close. I did as the manual says.
Do I need to open them more?
Waterluvr
New Member
Try 1 3/4 and see what you get there you have more volume in your cylinder now so a little more fuel would seem appropriate.
Tuning carbs is an art learned over time and LOTS of motors...
Bonmotwang
Well-Known Member
What should I do for the next hour. So far is 60 minutes.
Waterluvr
New Member
After 60 minutes I would put the boat on plane for a few hundred meters at a time and vary the throttle speed the whole time the boat is planing.
A top end does not require the lengthy break in a complete motor does and it's important to include some high rpm operation while the rings are seating.
At this point after an hour of satisfactory operation they are well on the way.
A top end does not require the lengthy break in a complete motor does and it's important to include some high rpm operation while the rings are seating.
At this point after an hour of satisfactory operation they are well on the way.
Bonmotwang
Well-Known Member
Ok taking off the air silencer to do 1.75 on low speed.
Bonmotwang
Well-Known Member
What range low speed screw is affecting. I couldn't tell there is a big difference.
Waterluvr
New Member
The big difference is how well it idles for an extended period of time without touching the throttle and it also effects the transfer to the high circuit when you bury the throttle and the initial boost of fuel from the accelerator pump is consumed.
Engine break in isn't the best time to be messing with such things but having it set 1/4 turn to the rich side isn't going to hurt anything if the motor seems to run well.
Engine break in isn't the best time to be messing with such things but having it set 1/4 turn to the rich side isn't going to hurt anything if the motor seems to run well.
Sportster-2001-951C-Stock
Well-Known Member
Water looks like milkshake when mixed with oil, dark oil looks like chocolate flavor but doesn't taste like chocolate.
I didn't mean to suggest you should taste it, though!
I didn't mean to suggest you should taste it, though!
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Bonmotwang
Well-Known Member
Yes. Seems to be better . Transition is better. Just did a 5000RPM planing. Very strong and smooth. Should I try 1/4 on the high speed too?
. Transition is better. Just did a 5000RPM planing. Very strong and smooth. Should I try 1/4 on the high speed too?
Waterluvr
New Member
Yep, more of a caramel color than anything chocolate. Man, an old school Hershey's bar sounds good right about now with a cup of coffee...
Waterluvr
New Member
Yes. Seems to be better
No, leave that be for now. At most if I wasn't happy with the low to high transition I would only crack it a hair between 1/16 to 1/8 turn for testing and were not getting into the max rpm range yet so it's not needed.
Bonmotwang
Well-Known Member
Transition is good. Tried another 5000 planing. Very good. Revved to 6000rpm for 3 seconds. Oops:-D
Waterluvr
New Member
No that's fine, in fact if it were my motor at this stage it would see wide open throttle occasionally for 10 second intervals now after the first hour accompanied by varied planing speed rpms over the course of 2-300 meter runs followed by a few minutes back to lower rpm ranges.
Your good to go, have some fun with it now for the next hour.
Sportster-2001-951C-Stock
Well-Known Member
I believe the manual settings will work well, the larger bore will make more vacuum and run richer, all else being equal.
During break-in it's okay to run slightly rich if you want to, the idle should not load up with too much fuel after a minute or two so while idling the RPM should not be trending lower (too rich).
I would set the idle speed no lower than 1400RPM, but that's me.
Bonmotwang
Well-Known Member
While breaking in. I pull the throttle back. It sits at 1900RPM. Won't go back to 1500 as I set at the dock.
Bonmotwang
Well-Known Member
During breaking in the cylinder head and body are all cold. The exhaust pipe is hot. The water coming out of back is hot.
Cylinder heats up after shut off the engine.
Cylinder heats up after shut off the engine.
Waterluvr
New Member
To fast, dial that back to as close to 1500 as you can get it.
Waterluvr
New Member
The raw water comes to the head first from the pump supply hose before it picks up heat anywhere else, so that's normal.
Sportster-2001-951C-Stock
Well-Known Member
Sounds similar to light 4-stroking, if you meant a slight rich miss as opposed to a backfire pop.
Bonmotwang
Well-Known Member
I have no reference. But sounds like rich missing. Not backfire pop. :-D
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