12mph at FULL THROTTLE

[griz400]

take a fuel sample, right at the carb, pull line and put in a clear clean bottle and look at fuel, also, i see that u put a set of used carbs, you should just had original ones rebuilt, cause really, you dont know how good a used set of carbs are that has been sitting around -- check fuel sample ......

 

[BOOSTINTT]

i have new gas.. i drained the old gas completely and put new gas.

i personally saw the jetski running from where i got one of the carbs and i swapped them and still same deal.

 

[griz400]

it shows that you have a fuel bowl and fuel filter, also what color are your fuel lines -- gray ??? and try on your selector valve the reserve position, and see if anything changes

 

[LouDoo]

Since I don't know what year your boat is, I'm working from a 98. Since the problem is common to both engines it's either the MPEM or the fuel system. Since it does run we can eliminate the MPEM because they either work or not.

Is the gas in the tank fresh? Do you still have grey tempo fuel lines?

Lou

 

[BOOSTINTT]

i do have the grey fuel lines. gas is new. but arent the grey lines located on each carb meaning i see all black lines from fuel tank and then the grey ones on each carbs.. so wouldnt be most likely only one engine having the issue

btw its a 1999 challenger

 

[Seadoobuddy]

If you have any gray lines running fuel through them, it can and has caused problems with "gooing" up.....REPLACE them ASAP

 

[BOOSTINTT]

i will replace these grey lines.. thats next on my list.

 

[Brucetafer]

mine had grey lines, and what a freaking mess... i would suggest a full carb clean on both since your doing everything you need to get these up and running great, might as well eliminate all options...

 

[griz400]

did you also check the fuel filters as i said in post 28 ??? http://fiche.seadoowarehouse.com/se...?Type=13&make=seadoojb&A=170&B=8&modelid=1998 Sea Doo Jet Boat Challenger FUEL SYSTEM --- parts 31 -- (2 of em )

 

[BOOSTINTT]

i changed the fuel filters that mount close to the mpem.. not sure where the other fuel filters are (the ones on the website you posted) i'll look for those..

 

[LouDoo]

A likely place for a fuel clog would be the carb. filters, part 32, clean these with castrol super clean, purple power, do not use carb. cleaner. Let us know what the inside of the carbs. look like.

http://fiche.seadoowarehouse.com/se... Boat Challenger 1800 (Aztec Red) CARBURETORS

Lou