Fouling Spark Plugs

[Babymoose]

I have read on some other posts that the RT's ran lots better after the 600 mile check up. I wonder if they are set at the factory to run rich for the break in - I have been told in the past that Motorcycle companies used to do that on new bikes & change the jets after the first service. Could BRP be doing something like that? Seems to me they could remap the fuel curve when they hook up to the BUDS. Just askin

 

[Magic Man]

I wonder if they are set at the factory to run rich for the break in - I have been told in the past that Motorcycle companies used to do that on new bikes & change the jets after the first service. Could BRP be doing something like that? Seems to me they could remap the fuel curve when they hook up to the BUDS. Just askin

I know for a FACT that both of our new 2009 Sea-Doos had a "break in program" that changes after 5 hours run time.

Been there, seen that, lived it twice.

As soon as the clock turns over to 6 hours it picks up several hundered RPM and several MPH.

I have also been told the 2010 GTX-IS I will be getting has it too.

I know these boats also have a GPS speed limiter built into the units to keep the Coast Guard happy, as they are fly by wire too.

As soon as you break 70 mph the machine pulls back the throttle and keeps the speed between 69 and 70 n o matter where you hold the throttle.

The machines in Europe do not have this limiter in them, and inasmuch will pull a few MHP more than US models do. nojoke

So I do think you may be on to something here for sure. :thumbup:

MM

 

[groundeffect]

As soon as the clock turns over to 6 hours it picks up several hundered RPM and several MPH.

Interesting!! Sounds like a piece of built-in safety code in their computers. Kind of neat during the break-in period.:dontknow:

 

[VaughnCat]

foued plugs .

I haven't had any issue with this on our RT-S. I have noticed an occasional burble while riding at a steady rpm for long period of time . . . I think this engine likes to be rung out from time to time . . . . like anyone could resist opening up the throttle anyway . . . I think the mapping will be refined in the future, but spark plugs are still much the same as they were a few decades ago. . . . wet a cold plug down with enough fuel, and it won't light up regardless of the ignition system. Warm that puppy up. . . . better yet, ride it!

 

[SpyderByter]

Depends on if you foul one, or both. Mine usually fouls one, so will just crank a long time, but often picks up. Fouling just one is another reason I suspect I may also have an ignition problem. The second plug to fire will sometimes not get fouled, however, depending on where it is in the engine cycle.

Scotty, Maybe Iridium plugs might resist the fouling better?

 

[rnet]

Here's the theory behind it, with fuel injected motor on start up the ECU is adding extra fuel the same way if you were choking a carbureted motor. the system will stay in rich mode until the motor reaches a specific temperature. If it doesn't reach this temp and you shut it down then extra fuel is left in the cylinder unburnt and on the next start up you could foul a plug. I have had this happen to me with the first year polaris fuel injected four stroke sled (FST). They have done a remap to correct this, but they still tell you not to shut it off tell it's warmed up.

The temp I believe for when the FST comes off rich mode (or start up) is 122 degrees. (water temp)

You are correct sir. I asked about this when I called into BRP yesterday and it should act the same on the RS and RT as they both have an enrichment cycle to go through at startup.

Lamont since you have the hot line to BRP it would be nice to know what temperature the Spyders come off of rich mode. Also maybe you could find out if they plan on doing any rides at americade. Thanks, Ron

 

[spyryder]

The temp I believe for when the FST comes off rich mode (or start up) is 122 degrees. (water temp)

it would be nice to know what temperature the Spyders come off of rich mode.

Looks like it relies on the oxygen sensor to come off of rich mode and enters 'closed loop' operation, from the service manual:

 

[rnet]

Now we just need somebody with a buds hook up to translate that to how many bars is on the temp gauge when this occurs.

 

[NancysToy]

Scotty, Maybe Iridium plugs might resist the fouling better?

We'll see.