94 Seadoo Explorer problem

[Viv Powell]

Hi, I am hoping someone has had this problem and can help me.

I have had my explorer f0r 4 yesra and for three of them it has been trouble free.

Last year I started having problems where I could not get it to getup on plane. It starts fine and idles ok but when I try to speed up to get on plane it chokes up.

I took it to my local boat shop and I followed everything they suggested. They checked out my carbs, I had them reore it with new pistons so I rebuilt the whole top end. New battery and new starter motor. I completed the rebuild yesterday and it fired up in the driveway. I took it to the dock today only to find I have the same problem.

Can anyone help me?

Thank you.

 

[LouDoo]

I know that you said the mechanic checked the carbs. Did he replace the grey fuel lines? Check and see if you still have grey tempo fuel lines. Also you might want to check the wear ring, the clearance between the wear ring and impeller should be not more than .040", about the thickness of a dime.

Here's a thread about the grey fuel lines.

http://www.seadooforum.com/showthre...el-Delivery-Problems-low-revs-bogging-surging

Lou

 

[Minnetonka4me]

On the explorers...the fuel lines are actually different. Well...I cant say for sure all Ive ever seen is 93s in person and they have large black lines.

Regardless, did they actually fully rebuild the carbs? The fuel selector prob needs to come apart too. Check and make sure you dont have an exhaust leak; Spray some fogging oil in the carbs when running, shut it down, and look for smoke.

 

[Viv Powell]

Hi Lou. Thanks for your response. There is only one piece of grey pipe that goes from the cars to the engine, it is about 6 inches long all the rest are thick 5/8 black pipe.

I rebuilt the impeller last year and eliminated the backlash to stop the ratling sound on idle. I removed the carbs and took it to the mechanic. He said he checked them over and they were fine. He did not mension about the grey fuel lines. Oh I had replaced the filter and O rings in the cards fuuel pump too.

My next step is to change the one grey line and if that dont work relace all the line.

Viv

 

[Viv Powell]

Thanks for your response. My Explorer also has all thick 5/8 black pipe except for one piece which is grey going from the carbs to the engine.

He said he checked them over and they were fine, he did not rebuild them. I had replaced the filter and O rings in the cards fuel pump.

My next step is to change the one grey line and if that dont work relace all the line.

Viv

 

[LouDoo]

I think the piece of grey hose you are talking about is probably the pulse line for the fuel pump in the mag. side carb., it most likely doesn't need to be replaced.

Since it sounds like the problem is not fuel related (I'm still not convinced it's not), the next place to look would be the engine. Get a compression reading, a healthy engine should be in the range of 140-150 psi. Check the compression on a cold or cool engine, remove and ground the spark plugs, and check with the throttle full open.

Lou

 

[Viv Powell]

I think the piece of grey hose you are talking about is probably the pulse line for the fuel pump in the mag. side carb., it most likely doesn't need to be replaced.

Since it sounds like the problem is not fuel related (I'm still not convinced it's not), the next place to look would be the engine. Get a compression reading, a healthy engine should be in the range of 140-150 psi. Check the compression on a cold or cool engine, remove and ground the spark plugs, and check with the throttle full open.

Lou

Hi Lou, I had checked the compression prior to taking into Snow City and the compression was 145 and 150. They told me that the bore was rough and that could be part of the problem. I knew it was not the problem but just to take that excuse away from them I had them bore the heads out and I purchased through them new oversized pistons which I installed my.

I thought it might have been the rotary valve as I took it off when I first stripped the engin down because I flooded the engine. I created the timing disc on the computer, cut it out and used it to mark the timing lines to line up the rotary valve. But it can't e that as when I first put it back in the water it ran like a bat out of help from the blluffs down to woodbie beach. It felt as if I had picked up weeds so we put it in reverse then shut the engine off but it would not start again. That was when I took it to Snow City. Since then I have replaced the battery, starter motor, rebored the engine, and changed all the filters.

I have not checked the compression since the rebuild, but I told Snow city that everything they suggested I would do but it will not fix the problem, I was right.

They said they checked the charging system and it was putting out just over 13 volts. They did not strip it down they just used a volt meter. Is it possible that there is a brake in the electrical system?

Thanks.

Viv