Hey guess just took the skis out for the first time yesterday. One of the superjets that I picked up over the winter is tough to get started once it is in the water. You have to hold the throtle wide open and crank and crank on it before it starts trying to start. It has dual 44mm buckshot carbs on it. When i bought it the carbs were set up for sea level elevation and i ride at about 2500 ft. So i put the same size jets i have in my other ski with a very similer setup (same size carbs, R&D pipes, ADA head, ect) Set the high and low speeds to the factory settings and it fired right up in the shop. But once it got on the water it was a pain to get it started. I dont like cranking and cranking on it as the OEM starters are expenssive. Any advice? By having to hold the throttle wide open suggest that it isnt getting enough fuel and i need to open up the low speed adjustment more? Any help, ideas, or shots in the dark would be great.
Superjet hard to start in the water. Any ideas?
- Thread starter yamaha415
- Start date
cosander
Dallas/Fort worth
Doesn't full throttle mean more air less fuel during start up?
SUPERTUNE
Race Gas Rules
- Location
- Clearwater Fl.
Sounds like the carbs are flooding to me.
Are they the billet Buckshots or the aftermarket mikuni's reworked?
If they're the billets, they made an early design and a late design, the early ones used a Holley needle valve and the later ones use the std Mikuni needle valve. If you have the early models, just junk them out, if the later models, replace the needle valve assemblies with only new OEM Mikuni replacements, use the same new OEM Mikuni needle valves for the std mikuni body carbs as well.
Are they the billet Buckshots or the aftermarket mikuni's reworked?
If they're the billets, they made an early design and a late design, the early ones used a Holley needle valve and the later ones use the std Mikuni needle valve. If you have the early models, just junk them out, if the later models, replace the needle valve assemblies with only new OEM Mikuni replacements, use the same new OEM Mikuni needle valves for the std mikuni body carbs as well.
Officer Mike
TJ / SJ / JJ
- Location
- Harveys Lake
try the head gasket? i had a ski once that wouldnt start in the water cause of that.
They are the aftermarket mikuni's reworked. The needles looked good but should i try changing them out? Thanks for the input
Brand new ADA head with good compression in both jugs. Thanks for the input
Mouthfulloflake
ISJWTA member #2
- Location
- NW Arkansas
DId you change the stock plugs out for B8ES plugs for the ADA head?
ger87410
How did I get here?
- Location
- Fort Worth
My 550 does the same thing.
Everyone was blaming it on the stock carb. Luckily, Wayne's got a mikuni carb for me that I'm getting in a few weeks. :smile:
Everyone was blaming it on the stock carb. Luckily, Wayne's got a mikuni carb for me that I'm getting in a few weeks. :smile:
Yeah i have brand new BR8ES plugs in there
ger87410
How did I get here?
- Location
- Fort Worth
U using the choke? If not, verify the choke plate is removed or stuck open.
Do both SJ's have the same carb? Can you swap carbs and see if the problem stays with the carb?
Do both SJ's have the same carb? Can you swap carbs and see if the problem stays with the carb?
ger87410
How did I get here?
- Location
- Fort Worth
If I was you, I'd swap carbs and see if the problem is in the carb, or the engine.
Please post results of that test. I'm very interested in them. :smile:
Please post results of that test. I'm very interested in them. :smile:
dajnglst
Glass Happens
- Location
- Charleston SC
Just as he put it, i would inspect the o-ring around the needle valve. The one that seals up the needle seat body and the carb. Blow out body filters also. I have seen more bad pwc carbs this year than any other time. I am not certain what is being used to blend the ethanol into the gasoline, but it sure seems as though it has been deteriorating rubber seals and o-rings faster.
norcal ex
X-H2
- Location
- San Jose, CA
hows the battery?
Filters are all cleaned out when i reassmbled them this winter. All the gaskets looked good, but ill open them up and re-examin.
About two weeks old, and it cranks strong
Idok
F1pro
- Location
- Nations oldest muthaF+++kin city
maybe the jetting/needles are too fat
have you tried leaning the low speed screws a little bit?
have you tried leaning the low speed screws a little bit?
That was my next move. Because once it gets started it is loaded up for like 3-5 seconds then it cuts lose. I was going to lean them off and see if that helps before i pull the carbs out. I was thinkin about crankin them in about a half turn and seeing where im at. Then we will go from there.
ger87410
How did I get here?
- Location
- Fort Worth
Be careful adjusting your needle more then 1/8th a turn!!!
Thats a big ten four rubber duck thanks for the heads up. The run of lack of carb problems has finally caught up to me. I dreeded this day coming.