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Compression on 2000 polaris 250 trailblazer

I have a hard starting engine and am wondering if 90psi for my compression is the cause. I seem to have good spark and fuel. I put in new plug and new fuel and cleaned the carb thouroughly so we can rule those out. Any suggestions are more than welcome thanks

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The fuel could be good but still it wont spit check the carbs when you throttle or kick start if thats possible if that is good try some starting fluid it should start up and the fuel pump should get out the obstruction if theres more problems it is one of many things either bad fuel pump, your fuel line is disconnected, blown headgasket idk the psi specs for the 250 but that sounds good i know for the 550s its around 120 and so on

Posted on Aug 14, 2009

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Posted on Jan 02, 2017

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SOURCE: need a diagram to route fuel lines on a carb

my polaris outlaw 500 sarted cuting out last ride could not ecerate past 1/4 throtle and was back fireing so went to fix and wont run at all i have spark, plug is wet, changed fuel, seems to have compresion, when it turns over it tries to fire at times more like a hickup almost stops the sarter and a puff of smoke out the carb. im about to tare it down any ideas whats wrong ? bike was hard to start but ran ran perfect killed raptors with ease. bike was bored and built by some shop before i owned using ktm sleave and piston ? motor says nicols 520. didt over heat or make noises. have tried cleaning carb, jeting no luck please help

Posted on Jul 14, 2009

kel1guy2002
  • 3740 Answers

SOURCE: my 2002 polaris trailblazer wont start it has fire

If you have oil and gas and it will fire then try a new plug. A bad plug when removed will appear to be fine but under compression can fail.

Also try a splash of good gas in the throat of the carb or intake (if fuel injected) with a new spark plug. My bet is it fires just fine.

If this is a fuel injector type engine you could have a bad injector control unit or a clogged injector.

If it fires with gas in the intake manifold then suspect carb or injector system. (which ever applies)

Thanks for using FixYa!

Kelly

Posted on Feb 19, 2010

  • 5 Answers

SOURCE: 250 Polaris Trailblazer wont start- new spark new filiter help

remove the carb flip it over and remove the bowl remove the small pilot jet that is recessed in the hole and clean it good . the pilot jet controls the idle circiut adjust the air screw on the carb to 1.5 turns out as a starting point

Posted on Apr 04, 2010

  • 1 Answer

SOURCE: BAD COMPRESSION ON MY POLARIS TRAILBLAZER 250 (2001).

rebuild the top end... re ring it. kit is only like eighty bucks

Posted on Apr 16, 2010

  • 1 Answer

SOURCE: No spark at plug on 99 polaris 250 trailblazer

i bought a 92 polaris trail blazer im very confused cus it has no battery and no battery leads going anywere and it has a back up pull start but its not geting any spark at all what should i do im not very good with quads?

Posted on Jun 11, 2010

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1994 suzuki quadrunner lt f250 wont run


Hey Marty,
An internal combustion engine requires three things to run..(if all the internals are good)..
1. A properly timed spark.
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Start by eliminating one of these at a time...(get a professional to clean and set the carb), install a new spark plug. Get a new fuel line.

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Dont always trust a spark plug that gives spark,(it might be a weak spark). Happen to me!! checked everything but didnt want to start, there was fuel,spark and everything seems fine but NO LUCK. Next day fitted new plug and it starts at once.

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that leaves compression

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The carburetor choke valve might be stuck open or not closing when the engine is cold. The engine needs a richer mixture to start. Too rich a mixture (flooding) can also cause trouble. Turn the fuel valve off to be sure the carb isn't leaking when not in use. If it smokes black on startup, it's flooding. Also check the condition of the spark plugs.

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According to an "ATV Rider" 2009 article, "When the Grizzly was introduced in 1998 as a 600cc machine, the top was blown right off the displacement wars of the time."
It was replaced in 2002 with Yamaha Grizzly 660, an even bigger engine derived from the well-established all-terrain vehicle (ATV) Yamaha Raptor 660R.
Grizzly's 660 cubic centimeter (cc), four-stroke, liquid-cooled single overhead camshaft, five-valve engine performs well in open country, but sometimes it causes serious problems for owners.
Before you call a Grizzly dealer, however, trying a few tricks in your garage can save you a lot of time and money.

Check the fuel level.
Locate the fuel meter indicator on top of the multifunction display.
If it does not work properly, open the fuel tank, and push the Yamaha 660 Grizzly side to side.
Ensure the fuel is not contaminated by water or rust.
If you have not driven your Grizzly 660 for a long time, drain the tank completely, and fill it with a fuel tank cleaner.

Check fuel hoses for cracks or leakage.
The hoses should be soft and simple to bend.
Replace those that show any sign of wear.

Check the compression.
Screw a compression tester into the spark plug hole, and press the electric starter button.
If no compression exists, contact a Yamaha dealer.
Wipe wet or dirty electrodes with a dry cloth.
The spark plug gap should be checked regularly

Correct the spark plug gap.
Measure the gap with a wire thickness gauge.
If necessary, adjust it to 0.8mm using a screwdriver or replace the spark plug.
Use only a Yamaha-specified spark plug.

Check the Yamaha 660 Grizzly's battery.
Operate its electric starter.
If the Grizzly starts quickly, then its battery is in good condition.
If the engine turns slowly, check the battery lead connections, and you may need to change the battery.
If the engine still does not eventually start, your Grizzly is beyond home repair.


Jul 23, 2013 | Yamaha 2005 Grizzly 660 Auto 4x4

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Have put new fuel pump on ,cleaned carb,new plug, gets gas plug fires but won't start, checked compression at98# don't know what else to do .


The battery voltage on a Suzuki I had would drop low enough during cranking with the electric starter motor not allowing the spark to be strong enough to run, the voltage regulator also didn't function correctly once and as the battery voltage dropped during operation engine would start to bog down and cut out due to low voltage for the ignition system.

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Have a 2000 polaris magnum 500 and it is a pain to get started choke seems too work fine even after i get it started it runs perfect but when i shut it back off its still hard too get started uselly gotta...


If you are certain the spark plug(s) is in good condition and correctly gapped, and the magneto is working normally, then you may have a fuel system problem. A quick diagnosis of fuel system issues is to spray a shot of starter fluid or WD-40 into the intake through the throttle body. If the engine fires for a bit then quits, it's a fuel system issue. Small engines do not do well with old ethanol-containing fuel. If it's turned yellow, drain it out and replace it, and remove any in the carburetor float bowl also.

Air leaks in the carburetor or intake manifold gasket may also cause hard starting. A sticky carburetor float or float valve is another possibility, especially if the engine was sitting for a long time with ethanol fuel drying out in the float bowl. A dirty air filter will also cause starting issues.

Feb 26, 2018 | Polaris ATV

1 Answer

Hey guys, I have a 03 banshee that a just had completely rebuilt. Crank, pistons, pipes, the works. When I got it back it ran great. Then we noticed it seemed to not be getting enough fuel in the power...


1. How could you tell it wasn't getting enough fuel in the "power band?"..i.e. the upper rpm range...?
A "power band" is simply the RPM range where the engine makes the most power.. it is more pronounced on modified two-cycle engines.. it is NOT something you can buy or have "installed".
Adjusting the float level only accomplishes getting more (or less) fuel in the carb bowls to make it available to the jets. >>The JETS are what (and ONLY what) gets the fuel to the engine!<<
Spark plugs are read to tell whether their is a need for a jetting change.. if you do not know how to do this - STOP tinkering with your engine-PERIOD!
You need a factory shop manual to get the necessary specifications of the ignition system,,(resistance values)...then and only then can you adequately check the wiring and related components...
What is a hot rod crank? I have built numerous banshee racing engines.. just wondering about yours.. $3000 in an engine.. it should have come with 34mm carbs, new head, ported cylinders, etc...jetted by the person that built the engine... if it didn't you need a new engine builder!!!
Do you live near North Alabama??

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