challenger 1800

Working on my 1997 Seadoo Challenger 1800 with twin 787's. Some may have seen my other recent post about 2-stroke oil leaking past the crankshaft seal and hydro-locking the Mag cylinder on the port motor. After a bunch of overthinking it, I decided to tear apart a good working motor to solve...

Parting out a 1999 1800 Challenger with twin 787 - One bad motor, one running motor. Cushions shot and missing cushion frames. I am located in South MS and local pickups are welcome. I don't scam on shipping and will post actual box size and weight. I accept paypal and/or venmo with buyer...

Howdy All! I just bought a 98 Seadoo Challenger. The port side engine doesn't start up. I figure with a little bit of elbow grease and some new parts, I can get it back up and running. Worst case, I'd rebuild the engine , but really hoping to avoid that if possible. The first thing I noticed...

I’ve got a 1997 Challenger 1800 and the gas gauge isn’t working. The low oil light does work. There is 12v coming into the gauge thru the purple wire as there should be. I’ve done all the diagnosis around the sending unit and the F1 fuse and all at the tank end are working as supposed to...

Has anyone changed out the fuel filters and valves on their own? We bought the boat last summer and it's acting like it starving for fuel once it gets up to 4500-5000RPM. I've read a couple places that the fuel system is pressurized but not sure if that is accurate. From what I can see, there...

I am having a problem with one of the twin 787 engines. I have been testing it on the trailer. When I start the port engine it will idle at about 3000 rpm in neutral but bogs if I try to give it more while in neutral. When I put it in forward and give it a little gas it will over rev to over...

Hi I recently purchased a 2001 seadoo challenger that the previous owner didn’t know the solution of the problem he told me he bought it bogging and he couldn’t fix the problem he rebuilt the carbs, new plugs, and new wiring for accessories he said there’s good compression in all cylinders what...

Hello, I recently purchased a 1999 seadoo challenger 1800 with 787 engines in them. I’m having a few issues with them that I can’t figure out. 1- on one of the motors the compression readings are around 210 on each cylinder. And I’m not sure why that is. I’m no mechanic but that doesn’t seem...

I have a 1997 Challenger 1800 with the dual 787 Rotax engines. I ran into a problem with one of the engines (left) starting then stopping after approx. 5 seconds. It was helpful to have one engine running fine as it allowed me to swap spark plugs and verify I still had a problem. In other...

So i recently purchased a 1998 Challenger 1800, with the intention of storing the boat in the garage. When storing the boat, there is a definite smell of gasoline. I am not worried about ignition, more the usability of the remainder of the garage (as it is meant to be my home gym). In was...

Hi guys new to the forum. My names Nate. I’ve got a 1998 Challenger 1800 with 787’s in it. The port motor is hard starting but runs. I did a compression test at the end of last year and found 175psi on 3 and 55psi on the port motor rear cylinder. My brother and I just got around to pulling the...

Bought the boat for really good price knowing it was going to need some TLC. Had a blatant fuel delivery issue as fuel was pouring out of throttle body. Pulled apart and found lines going into fuel rail were disconnected and a couple other little things inside that lead me to believe someone had...

A Challenger from 1998 with the twin 787 setup. Installed a used supposedly working mpem with DESS. I get two short beeps and one short, one long in advanced mode. All fuses checked including the ones behind Master switch. I have spark to the coils when checking with test light. Resistance test...

Hello, I am negotiating to buy a 2001 Challenger 1800. The owner is over 300 kilometres away, so I am asking a lot of questions before making the drive. He says the boat is driven by twin 160 hp Rotax engines - rebuilt 20 and 30 hours respectively. All my research shows that a 2001 Challenger...

I have a 1999 Challenger 1800 with twin 787 engines. It was running fine when I winterized it and put it away for the winter. When I took it out of storage it would not start. I was not getting spark to either engine. I am getting 2 beeps when connecting DESS and both starters turn. Checked...

Looking to install a Garmin 53 DV Chartplotter / Sonar in a 2001 Challenger 1800. The Garmin 53 DV comes with a GT-22 Transducer. Want to do a Shoot Thru Hull install. Can I use the standard GT-22 Transducer or do I need a P72 ? The GT-22 is a Transom Mount, has anyone glued one of these...

I received a 99 challenger seadoo 1800 that has not been winterized for 3 years, had oil and gas still in it and has just been sitting still outside for years. I have new batteries and hAve no clue what to do next and little to no knowledge about boats. When I try to start it the motors just...

]I have a beautiful 1998 Challenger 1800 it is sharp the engines have been completely rebuilt and are very crisp. I had to have the carburetors rebuilt and we ran into problems the bodies on the carburetors are shot and they're being told that I need new ones. Sea-Doo is discontinued the carbs...

I have a 1997 Challenger 1800 that I've had for 8 years. Just got it out of climate controlled storage, dropped in recharged battery, put on DSS, got the beep that all was good to fire-up and then Loud Clicking/knocking sounds coming from Main fuse-box in engine compartment. Removed the cover...

I recently put a new top end in one of the engines of my 99 SeaDoo Challenger 1800. I took it out this weekend to break in the new top end (first time taking the boat out). Toward the end of the ride there was a loud continuous beeping sound. I didn't know what this was but I saw the fuel switch...