Well, without any pics of the actual plug or removing the top end it's very difficult to know for sure whether the plug tip was actually hit like you had suggested or whether it was predetonation or perhaps the end of the plug may have even been hit on something before it was installed and then fouled quickly b/c of having such a small gapSkidooslayer687 said:
I guess we'll just have to wait and see what he finds when he pulls the head off.fortress
New member
ok guys, alot of thing here!! FIRST THANK YOU SO MUCH FOR YOUR HELP
and sorry for my bad english
for the plug, i did put 3 news plugs before the ride cuz the day before, i did fool a plug by running the sled on a stand and push the throttle a little
I did run 1h and like i said, after some several stop and go testing, the sled did the problem has the past 2 winters.. Doesnt reach more than 8000, drop to 7800 and really doesnt run fine, the sound of the engine is like if he run on two cylinders or if i was towing something.. or if some gaz are missing.. well, difficult to explain!!
I didnt say that the carbs problem is causing the sparkplugs issue.
OK let me resume the situation
I have the sled since 2003... i'm the second owner and the sled did run real fine for 2 winters.. Suddenly after a summer and entering the winter season, the sled did begin to not run properly.. Its the problem i did describe in my first post and in the past 2 years in this forum.. no power, can't reach more than 140Km/h
of course i did try the check the simple thing at first, clutch, vavles, powervavle motor, bearing, cdi box and finally, the Stator... Electrical wiring, harness, tried to run the sled with all the electrical thing unplug,, trying the sled with valves open manually, compression check, timing check, crankshaft check.....did change 3 times the sparkplug cap, cut off a little of the wire to remove the rust before putting the cap...... nothing did work
Last winter, the sled did run ok for 2 rides.. Don'T ask me why, i don't undersand.. The sled did run fine for 15 min in my ride this last week end.. and suddenly, the power did drop.. i did feel it,, no more top end , no more rpm, max 7800 8000
at the end of the ride, after testing the sled at full throttle again, i did full a plug and its the plug that have been messed up.. It look like something have hit the "tongue" I'll take a picture this afternoon and will post it..
i did put another plug and did reach my car.. i was able to push throttle but the sled wasnt idling
like i said, the last time i did open the carbs, it was in the winter just before the problem did appear.. The carbs are stock.. I did make the test of the plug last year. running the sled at full throttle, shut off the engine and check the plug,, they were all fine!! same brown color on all three. I did assume that the carbs wasnt the problem...
what are you suggesting me?? opening the wrong Cylinder before do anything else???
and sorry for my bad english
for the plug, i did put 3 news plugs before the ride cuz the day before, i did fool a plug by running the sled on a stand and push the throttle a little
I did run 1h and like i said, after some several stop and go testing, the sled did the problem has the past 2 winters.. Doesnt reach more than 8000, drop to 7800 and really doesnt run fine, the sound of the engine is like if he run on two cylinders or if i was towing something.. or if some gaz are missing.. well, difficult to explain!!
I didnt say that the carbs problem is causing the sparkplugs issue.
OK let me resume the situation
I have the sled since 2003... i'm the second owner and the sled did run real fine for 2 winters.. Suddenly after a summer and entering the winter season, the sled did begin to not run properly.. Its the problem i did describe in my first post and in the past 2 years in this forum.. no power, can't reach more than 140Km/h
of course i did try the check the simple thing at first, clutch, vavles, powervavle motor, bearing, cdi box and finally, the Stator... Electrical wiring, harness, tried to run the sled with all the electrical thing unplug,, trying the sled with valves open manually, compression check, timing check, crankshaft check.....did change 3 times the sparkplug cap, cut off a little of the wire to remove the rust before putting the cap...... nothing did work
Last winter, the sled did run ok for 2 rides.. Don'T ask me why, i don't undersand.. The sled did run fine for 15 min in my ride this last week end.. and suddenly, the power did drop.. i did feel it,, no more top end , no more rpm, max 7800 8000
at the end of the ride, after testing the sled at full throttle again, i did full a plug and its the plug that have been messed up.. It look like something have hit the "tongue" I'll take a picture this afternoon and will post it..
i did put another plug and did reach my car.. i was able to push throttle but the sled wasnt idling
like i said, the last time i did open the carbs, it was in the winter just before the problem did appear.. The carbs are stock.. I did make the test of the plug last year. running the sled at full throttle, shut off the engine and check the plug,, they were all fine!! same brown color on all three. I did assume that the carbs wasnt the problem...
what are you suggesting me?? opening the wrong Cylinder before do anything else???
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I had a similar issue a couple of years ago. The carbs were getting something in them from the fuel system when the sled was new. It would run fine at first, then hit-and-miss, then hardly run at all. Stop for a while, and the process would start all over. Happened several times that required a full carb cleaning each time to finally clear the system. Since your problem started after a summer, I think you have a carb issue. Like several here said, most likely you had a cylinder go lean with a bad carb and possibly broke a ring that hit your plug. Take the advice and pull the top end and look for more damage, then attack the carbs.
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fortress
New member
Mtn-Track said:
are you able to tell me how to do it?? opening the engine? i did start a post about it
and for the carbs, the brown color on all 3 sparkplugs would not indicate that the carbs are ok??
what was your specific symptom with your sled?
If you actually had an impact mark on the plug, that is bad. That means something ran through the cylinder. If it has happened more than once AND you have an impact mark on the plug each time, something is comming apart in the engine. Take the plugs out and look into each cylinder with the piston about half way down (as others have posted, with a small light). Your looking for impact marks on the top of the pistons. If your plugs are showing impact marks, you should see something on the top of the pistons. If there are NO marks on the pistons, then I would question the marks on the plug and thus could be detonation. If there are marks on the pistons, then you should pull the head off and check the rings.
My symptoms were just as you described in your original post. My plugs were not conclusive, but the power drops were the primary indication. The result of debris in the carbs.
My symptoms were just as you described in your original post. My plugs were not conclusive, but the power drops were the primary indication. The result of debris in the carbs.
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fortress
New member
Mtn-Track said:
i cant see enough through the hole.. i will open the head!!
it happened only one time.. one thing i didnt say his that i did put a little amount of ordinary fuel in it cuz the tank was empty and i needed to put the sled on the trailer.. but i did put some super gaz after it.. but the ordinary fuel has been burned before the sparkplug did blow.
I'll post a pic of the sparkplug in few minutes
fortress
New member
my damn "kodak" doenst work.. i'll try with my webcam tonight
fortress
New member
daman
New member
Yes you need to see what it looks like in there,so eather try a light again
pull the head off,try a compresion test, somthing..
pull the head off,try a compresion test, somthing..
chilli
New member
I see 1 thing wrong right away.....BR9ES is what I see in the 1st picture. If you are running an srx, those need to be br9eCs plugs.. Correct me if Im wrong, but aren't the ECS plugs slightly shorter that the 9es? aka, bent electrode? Just a thought.
daman
New member
No i think there the same length.
chilli said:
I may be wrong here, 9 is the length & letters are heat range...anyways he would have all three with bent ends & not just one...
Or vise-versa sorry guys I should have did a little research before commenting...my mind sometimes lets me down, no harm intended...Don hit it right...
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dave72
New member
The br9ecs have a recessed elctrode on them for the tighter squish clearance on the 00 and up srx's the br9es do stick down into the cyl farther
running a ES instead of a ECS wont make something hit the plug, the differance between the es and the ecs has to do witth the way the plug dissapates heat, and quenching of the flame,the ecs is a cooler running plug then a es of the same "9" heat range, the 9 is the heat range of the plug. You can read all about it on NGK's website.
To close the plug like that you either have a foriegn object that went thru the engine, alot of carbon buildup, or a bad wristpin/lower rod bearing, detonation can contribute to this but usually the plug is very hot to do so and the offtime explosions from the hot spots does the damage, but just looking at your pic it does look like something struck the ground strap bending it.
step 1.)Pull the head and post pics.
EDIT: is there any knock sound to it when running?
To close the plug like that you either have a foriegn object that went thru the engine, alot of carbon buildup, or a bad wristpin/lower rod bearing, detonation can contribute to this but usually the plug is very hot to do so and the offtime explosions from the hot spots does the damage, but just looking at your pic it does look like something struck the ground strap bending it.
step 1.)Pull the head and post pics.
EDIT: is there any knock sound to it when running?
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fortress
New member
mrviper700 said:
when i did put another sparkplug, i did not hear something wrong and i was able to reach my car by running the sled slowly.. the sled was running fine except wasnt able to idle
For the sparkplugs.. If you read here on this forum, it has been well documented that the srx work with standard sparkplug.. i would not have been running them if not..
well, no choice, i need to open it
right fortress, I know that simply putting in br9es has absolutley nothing to do with the ground strap being pushed closed. I have ran all differnt kinds of plugs in a srx and sparkplug is no where near the piston even on 7 and 8 range plugs.
I hope its something you just inhaled , and not the conn. rod bearings.
after you pull the head if theres alot of dinging in the piston top your only 4 nuts more away from slipping the cylinder up off the piston, this way you can grab ahold of the rod and see if it has slop in it, but lets see how bad it looks on top of the piston, baby steps to see whats wrong...post the pics and we can walk thru this and find the problem.
I hope its something you just inhaled , and not the conn. rod bearings.
after you pull the head if theres alot of dinging in the piston top your only 4 nuts more away from slipping the cylinder up off the piston, this way you can grab ahold of the rod and see if it has slop in it, but lets see how bad it looks on top of the piston, baby steps to see whats wrong...post the pics and we can walk thru this and find the problem.
fortress
New member
mrviper700 said:
thx, I,ll start to work on that this evening
Just a thought, did you pull the PV from that cylinder and look at the end of it?