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I purchased a big boss 350 with the oil injection disconnected and running on mixed gas. Is this o.k. and what ratio mix should I use.

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40-1 ratio will work fine for a clean burn. Under heavy loads and dry hot conditions use 32:1 Team X

Posted on Oct 03, 2010


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2001polaris 700cc is this a two stroke ? What fuel &oil do I use

Any 2 cycle oil will work and it is mixed 40 to 1 with gasoline.

Oct 10, 2016 | Polaris ATV

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Got a 1996 polaris xplorer 4x4 .wont start,fan and oil light is on,we mix gas in the tank,oil jug empty,could this be why oil jug empty.

if it has a oil light on and the oil reservoir is empty , the it would be reasonable assumption that unless there is oil available to mix with the fuel , it will not be allowed to start
It is a 2 stroke that has a metered amount of oil that varies according to engine rpms and is not a pre-mix situation that you have assumed it to be
so fill the oil tank with the correct 2 stroke oil, remove the oil mix fuel and save it for a whipper snipper or other small engine , fill the tank with the correct fuel and it will most likely start

Jun 11, 2016 | ATVs

1 Answer

How do you remove the thermostat from a 93 Polaris trail boss 350L 4x4

Nov 5, 2014 - 4x4 free printable 1989 polaris trail boss 350 2x4 parts 03 polaris 350trail ... engine diagram trail boss 350 4 stroke diagram how to test the thermostat ... apolaris trail boss 1994 350 shop manual for 1993 polaris 4x4 trail boss ... boss 350oil pump repair manual for polaris trail boss 1987 removing jets in ...

Sep 25, 2015 | ATVs

1 Answer

1988 Polaris 2x4 trailblazer 250cc my question is if it runs for a couple minutes with straight gas did I mess the motor up it's getting fire n gas n it's got compression just will not start

If you ran it with straight Gan you could have trashed the rings lowering the compression enough that it will not start. Do a compression check and see what it has. Make sure you have a 32:1 or 40:1 mix if you are not using the injection system or if it is not working. Quality oil too. Don't do the compression check without normal premix in there. You need at least 110 lbs to run on the low side although I have seen some run at 105.

Jul 12, 2015 | ATVs

1 Answer

Is the 2008 ATV 125 4 wheeler a 2 stroke

Tommy, that question is a bit hard not knowing the make. However, ALL 2-strokes MUST either get their lubrication from pre-mix or an oil injection tank. Also 2-strokes have simply a finned head that the sparkplug screws into directly in the center of the head. While a 4-stroke may have one or more cams, two or more valves in the head and the sparkplug is usually placed on one side of the head.

Dec 19, 2014 | ATVs

1 Answer

My 2003 polaris predator 90cc will start for a few seconds the power sports shop said the oil pump isn't working but it's all still hooked up now when u give it gas it boggs and dies could I be overloading...

Hey Anon, READ this over and over.. then read it again...
First, decide whether you are going to run an oil pump or not. I would recommend NOT running one if you are going to race this ATV.. properly premixed fuel/oil will never fail.. an oil pump can/will/HAS...
Remove and plug/seal all oil passages to and from the oil pump, seal the oil entrance connection to the cylinder with a good gasket sealer -NOT SILICONE - gasoline breaks it down!!
The only jets in a carburetor that ever need replacing, under normal situations, are the needle jet/jet needle combination-these wear out and are replaced as a set! There is no need to "re-jet" an unmodified engine until you get approx. 1000ft above sea level, then dropping the main jet ONE size usually works..(sometimes only raising the jet needle circlip two notches works if the bike isn't ran wide open for long distances).
NOW - - You decided to remove the oil pump - Drain all the gas out of the tank.. have a QUALIFIED PROFESSIONAL clean and set the carburetor! Run a premix of QUALITY two-cycle oil at 24:1.. this WILL protect your engine under all/racing conditions!! NEVER- -NEVER try to get your engine running cleaner by reducing your oil mixture!!!! Always use the same oil mixture/ratio - spark plugs are much cheaper than pistons!!!! FIND a great two-cycle engine tuner that can "read a spark plug"....It's hard to find a really good two-cycle tuner than can actually "read" a spark plug....
I can tell if your timing is too advanced or too retarded, if your oil mixture is correct,.. if your jetting is correct.. your combustion chamber area is correct,...ALL by looking at your spark plug!!
.... I see amateur "tuners" and guys that call themselves mechanics try to get a two cycle engine running cleaner by reducing the oil mixture - (adjusting the oil/fuel).. and eventually end up frying the engine.. and they can't figure out why>>???
DO NOT mix more than you are going to use each time!!... (use the left over to kill weeds).. DO NOT put it in your vehicles - IT WILL (burning oil) clog your catalytic convert!!
Have you done any modifications to this engine? If so, then you need to find a qualified pro who knows how to read a spark plug and "jet" the engine accordingly.
... Do you live near North Alabama?.. I could help...
..If you are going to race this ATV, please find a good mechanic/tuner that can help...

MY BEST ADVICE - SUSPENSION TUNING will make her go faster than engine mods!!! (the faster it goes.. the better it MUST handle.. make it handle FIRST!!!
Contact any/all of these folks.. ask for their recommendations...(DO NOT overstate her abilities.. this will only hurt!!)
ATV Suspension Upgrades FOX
DeRisi Racing Inc

rubber side down to go fast!!...

Sep 05, 2017 | ATVs

1 Answer

How do u adjust the throttle and fine tune carb also how do you know that injection pump that mixes with oil is working

a lot of people that take these apart put them back together backwards. make sure it is right. most of those carbs are not adjustable other than the jet itself. make sure your fuel tank is clean and fuel lines are clear/ fuel filters are clear or new.

Aug 15, 2013 | Yamaha 2004 Blaster Base

3 Answers

My son was riding his 2004 blaster was having a blast but ran it for about 4 hours. When he went to ride it home ess than 5 blocks away it stalled and the kick start seized and won't puch down. In addition...

Sounds like you need a rebuild. Dont use cheap china parts, go online to And get this. This should be everything you need to rebuild it. Now you need to MIX your oil. Not use the tank. Google blaster oil tank bypass and just remove the tank as it can tear up the engine badly. The oil pump can send shards of plastic into the crank and cause it to fail. Once you have done this, You can have the engine built, mix the oil 32:1 and insert into the gas tank. After this is all complete it should all be running even smoother then before. For any other help go to

Aug 08, 2013 | Yamaha 2004 Blaster Base

1 Answer

Just bought 2008 model 650 can-am max xt dealerhad 41 miles on it,they changed oil before i took it home ,it set in my garage for two days , when i went to ride it i checked the oil an it was over full...

If the oil is milky it has a bad and leaking seal somewhere that the gas is gitting in, or it has water in it. Water does not mix well with oil as you may know so I'd guess its gas is getting in. If it does run, change the oil right away then see if the oil develops the milky look again. Probably a seal would be my guess. Good luck.

Apr 21, 2009 | RTO 125cc ATV Quads Full Size Adult four...

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