2002 250 rude DI cuts out at wot

[dbg845]

This has happened twice now, cruising at approx. 3500-4000 rpm then open the engine up to wot and suddenly after 2-3 mins. the engine loses rpms and dies, attempt to restart is a little difficult but it does start up and runs fine.<br />I check the primer bulb, it is hard, gas vent is free, no restrictions, racor filter is fine.<br />I have the Faira Helmsman gauges which will give you a trouble code, says system is ok. Mechanic will be checking the EMM this week. The engine is great, sips gas and oil and plenty of power.<br />Anti syphon valve is clear and there is no screen in the gas pickup tube. Engien is on a Parker 25 MVSC. Any advise on this one, thanks

 

[seahorse5]

Re: 2002 250 rude DI cuts out at wot

A DFI outboard with a fuel problem can quit just like if it had an electrical problem. Hook up a fuel pressure gauge on the "tire valve" fitting on the fuel rail and watch the pressure while running. It should be above 20psi, 25 is ideal, at all speeds. When you turn it off, the pressure should drop a few psi then hold for a while. If it goes to 0, then you have a pressure regulator problem. If it drops to and stays to 10, then an injector is leaking internally.<br /><br />You can use a timing lite on each plug wire to narrow down the offending cylinder if it is an electrical problem. Make sure the crank position sensor is set to the minimum clearance as there were harmonic problems with some early production 2002 motors.<br /><br />When you try to start up the motor, does the tach read as it's cranking, or does it stay at 0? If it stays at 0, it may be a crank position sensor problem.

 

[dbg845]

Re: 2002 250 rude DI cuts out at wot

Thanks for the info seahorse, My marina ran a diagnostic on the EMM and thee was not trouble codes in the system.<br />The way that the engine cut out was exactly if there was no gas. At 5k with the throttle lever at wot the rpms just dropped to zero. The first time this happened I was cruising at 4k, engine started to run rough, when I accellerated it got worse, brought it back down to 3500 and came back in-ran ok. Got to the dock, tech looked at the engine, went back out the and the rest of the day was fine. What is the harmonics you speak of? Do you mean that vibrations are causing this problem?<br />Please advise.

 

[seahorse5]

Re: 2002 250 rude DI cuts out at wot

The factory came out with a new sensor bracket for the 2002 crankshaft sensor. At times, the vibration would change the gap from the sensor to the flywheel, and the computer would momentarily shut down, or maybe just misfire. Not all motors did that, and it may not be your problem, but is another avenue to pursue.

 

[dbg845]

Re: 2002 250 rude DI cuts out at wot

The Bomb has been called today and let's see how fast they can solve this problem!! I'll let you know the outcome, thanks again.

 

[seahorse5]

Re: 2002 250 rude DI cuts out at wot

Did you call Bombardier, or did your dealer?<br /><br />If your dealer did, he talks directly to a tech who can guide him thru troubleshooting right then and there. If you called, you probably talked to a customer service rep who takes info and contacts the dealer for his side of the situation. The results should be the same, but the dealer way is the quickest.

 

[dbg845]

Re: 2002 250 rude DI cuts out at wot

The dealer spoke with the tech rep. today and as soon as he described the problem the tech. rep. quickly read off the part number for the new support bracket and said it occurs when the engine is running at approx. 3500-4000 rpms and that is exactly when it happened to me (how come no tech bulletin?) gee I'm glad it's not the same old OMC way of doing business!!. Seems that it is not automatic that they upgrade, only when the problem appears.<br />The tech rep. also suggested checking a couple of ground connections, which we did, and they were tight. So you are right on the money, hopefully the new bracket will be in next week.<br />Thanks again, you sure helped (I did show my marina owner your e-mail).<br />Have a happy holiday weekend.

 

[seahorse5]

Re: 2002 250 rude DI cuts out at wot

I forgot to mention about the grounds. The heavy coat of electro-deposition black paint can affect the ground connections, even with the toothed lockwashers. Ask your tech to remove the EMM ground wire at the top of the block, and to scrape away the paint until shiny aluminum shows, then reinstall the wires and lockwasher.<br /><br />There is no tech bulletin because the problem is rare, not all motors do it. I've only seen two have this problem since 2001 when they came out. If you change props, the vibration harmonic changes on your rig and you may never see the problem again.

 

[dbg845]

Re: 2002 250 rude DI cuts out at wot

Again thanks, I run a four blade stainless 17x141/2,engine is on a bracket, good mid range mileage and handling. <br />Oddly there is no percieved vibration at the helm but I'm sure there is some back there.<br />Will let you know the outcome of the repair, looks like the flywheel has to come off and the air intake to get a the bracket for replacement.

 

[seahorse5]

Re: 2002 250 rude DI cuts out at wot

Nah! It's a 15 minute job including the gap setting. Be sure it is set to minimum.

 

[dbg845]

Re: 2002 250 rude DI cuts out at wot

That's good to know, thanks again.