Finally learned how to adjust carbs!!!

N

n247hp

N247hp
Location
Philly
Last night spent an hour adjusting the carbs following the direction from this site and it finally worked. The boat rips. I started with low and high speeds at 1 turn out. And started slowly adjusting the the high speed. The ski would have too much fuel in the high speed circuit so i started to screwing them in at 1/8 of turn on every try and after about 5-6 adjustments i got the top speed nice a solid. It would take off nice and you can just feel and hear the engine running nice and clean at top rpms. Then i began playing with the low speed screws and did the same till the take off was perfect and no hesitation. Ski runs 100 times better and much more power. You can just hear the engine barking like a dog every time you pull the throttle. Takes time and patience but once done, makes huge difference
 
SuperJETT

SuperJETT

So long and thanks for all the fish
Location
none
You really should do the low speed first because it affects the high speed circuit. I would go back and double check your high speed tuning now if you haven't already.
 
N

n247hp

N247hp
Location
Philly
i didnt use the tach although i have one. The directions did say to start with high speed but i will read more into it. Thanks tho. I mean regardless the ski runs a lot better and was a little surprised to get this much more power out of it. Its like i got a new motor!!!!
 
Mark44

Mark44

Katie's Boss
Location
100% one place
i

n247hp said:
i didnt use the tach although i have one. The directions did say to start with high speed but i will read more into it. Thanks tho. I mean regardless the ski runs a lot better and was a little surprised to get this much more power out of it. Its like i got a new motor!!!!
Click to expand...

To set properly you need to use a tach. These are the best instructions I have seen on this site.

http://www.x-h2o.com/threads/39846

Mark44
 
tilleryrat

tilleryrat

Location
Albemarle NC
simply because I am a rookie to the tuning side of things, how do you properly tune with a tach. That article states "Start with the screws set at 1 turn out, and tune with the tachometer for peak Rpm". For someone who has never done this, this is pretty vague. Another "vague" point when reading about tuning carbs, and this is from factory pipes website I think dubbed from mikuni "If the engine hesitates, the carb is lean. If the engine takes a second or two to clear out and then accelerate, the carb is too rich." Is it just me but if the engine takes a second or two to clear, would that be a hesitation??? HELP!
 
SuperJETT

SuperJETT

So long and thanks for all the fish
Location
none
lean/hesitation - rpms drop then go up, if really lean it will actually die
rich/bog - rpms climb slowly then it lights up all of a sudden and goes
 
SQUARE JOEL!!!

SQUARE JOEL!!!

Location
Look for me when you see me coming!
tilleryrat said:
simply because I am a rookie to the tuning side of things, how do you properly tune with a tach. That article states "Start with the screws set at 1 turn out, and tune with the tachometer for peak Rpm". For someone who has never done this, this is pretty vague. Another "vague" point when reading about tuning carbs, and this is from factory pipes website I think dubbed from mikuni "If the engine hesitates, the carb is lean. If the engine takes a second or two to clear out and then accelerate, the carb is too rich." Is it just me but if the engine takes a second or two to clear, would that be a hesitation??? HELP!
Click to expand...

Using the tach, make a few WOT runs. Then adjust your HS + or -. If the RPMS drop from the initial run then go the opposite way. Do this until you find the highest "peak" RPM.
 
tilleryrat

tilleryrat

Location
Albemarle NC
what type of tach and where is the best place to purchase? Thanks for the info, it's bound to seem too much like a training course on here to the experts sometimes.
 
SQUARE JOEL!!!

SQUARE JOEL!!!

Location
Look for me when you see me coming!
tilleryrat said:
what type of tach and where is the best place to purchase? Thanks for the info, it's bound to seem too much like a training course on here to the experts sometimes.
Click to expand...

You will get mixed opinions on this. Tiny tach is best economically but is slow at updating. Or the PET tach is much better but much more expensive.

http://www.tinytach.com/tinytach/gasoline.php

You would want model number TT226NR-1C or TT226R-1C (only difference is the latter has ability to reset the accumulated hours).

http://www.watcon.com/Catalog_Pages/PET-2100_DX.htm
 
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