Polaris 450 bogging out

[beeker]

Any ideas? Polaris. Offer out today like it was running out of gas.. had full tank .. I was giving it a lot of throttle going through some muck and it sounded like it was going to choke out? Going to pull air cleaner and plug in the morning. Wondering if anyone has had this before. It’s a 2006.

[Gunner55]

Ours is a Grizzly & no issues with that but we had some problems with our boat motor. It was fouling out bad until I ran almost a full can of Seafoam through it with the next 6 gallons of gas. Then I switched from non- oxy premium gas to regular unleaded & haven't had a problem since.

[beeker]

Spent some time today changed the spark plug, air filter, fuel filter, oil and added some seafoam... ran like new after that. Also zip tied up a few cracks in the plastic

[mike89]

always use good gas and sea foam or satybill!!!!

[beeker]

I always grab the “hot rod” non oxygenated gas when I can. Use that in the small chainsaw lawnmower and stuff also

[Rebel SS]

That's all ya should use in any small engine. (and boat) Non-oxy. Real gas.  Even Kwik-trips have a non-oxy pump.

[Boar]

huh?

[Gunner55]

Our Yammie 115 hp owners manual says regular unleaded gas of at least 86 octane. Later on the manual says higher octane may be used but it may cause the motor to carbon up, it seems to make a big difference with our outboard. I've checked around & all the non-oxy I can find is premium & 91 octane. That loads ours up bad if you don't run it wide open all the time.

[LPS]

Interesting Gunner, I have not heard that before.  I use primo non oxy in my small engines.  And a splash of Sea Foam.

[glenn57]

huh?

boar.............just use fireball to run them canoe paddles!!!!!!!!!!!

[Gunner55]

Maybe it was some old non-oxy, I'll havta try it again with some from M & H in GR, that I know isn't old.

[Rebel SS]

Interesting Gunner, I have not heard that before.  I use primo non oxy in my small engines.  And a splash of Sea Foam.

Never heard that either. All non-oxy is 91 octane.(around here, anyway) I second Barry on the above. I'd try it again, Gunner.

[mike89]

same as Barry here too.... 

[Rebel SS]

Lower octane burns at a lower temp than high octane, and actually puts out more BTU's of energy than a higher octane...really! One does not burn "cleaner" than the other. Should not be any effect of "carbon build up" when using straight gas. If it's mixed gas, and yer not using a good synthetic or semi-syn, with lots of low end running, and higher octane, then I could see that.

[deadeye]

Boy there are many theories on which octane to use in various engines.  Rebel SS is right, about higher octane and higher temp.  That is why high compression engines "ping" on regular and require high octane to prevent pre-ignition similar to how a diesel engine works.  I have had starting problems with small engines using premium fuel.  Switched to regular 87 and no more issues. 

[mike89]

all the new new Harleys call for 91 and I only had to put 87 in it once.  didn't seem to matter...  but still buy the 91....

[Rebel SS]

Used to field the same gazillion questions on my ice auger site, guys dumping in premium and telling everyone how much better it is to run. NOT for a small 2-3 HP 2 stroke air-cooled engine, it's not. That and the engines that are designed to run 50:1, they'd bump 'em to 100:1 mix so ya don't "Get all that smoke and fouled plugs". If yer engine is tuned right, has the right plugs and gas, you don't get smoke and fouled plugs. Then they wondered why their top end was sizzled. I used to race and build Yamaha motorcycle engines back in the day, and know a thing or two. I've never had "smoke and fouled plugs." But ya can't tell some people anything... Got so bad, I just gave up the column and said to heck with it. Wasn't worth all the arguing back and forth with the curbstone mechanics. .

[Rebel SS]

all the new new Harleys call for 91 and I only had to put 87 in it once.  didn't seem to matter...  but still buy the 91....

That's cuz their Evolution engines are 11:1 comp ratio, and 10:1 on the other engines. Need the higher octane. Try running 87 oct in a built 455 with 16:1 comp ratio and hemi heads....   Stick with the higher octane, Mikey.

[mike89]

I do thanks!!!!