It’s a Gas

33cc 2 STROKE UNITS

Let me start off by saying that ALL gas units are started and ran at the factory before they come to the US. If you buy a new unit and are having trouble starting it you are probably doing something wrong, it is not the unit. This page is designed to give you more information about the ins and outs of the gas units, above and beyond the owners manual, what can be fixed on them and what the most common problems are, in order of popularity.

My unit will not start! Crikies!!!

1. Most common problem, wrong mix of gas and oil! The mix is maximum 25:1 to 30:1 minimum, this equates to about a minimum of 1/2 cup and maximum of 3/4 cup of 2-stroke oil, not car oil, to a gallon of gas. Too much oil will foul the plug, cause difficulty starting and make the unit run poorly. Proper mixture is CRITICAL! If you are not sure of what you have in your unit, dump this out, hopefully into your car, since there is not enough oil in it to hurt your gas. Start with fresh gas and use the mixing photo example on left. You should have this mixing tank with your unit. Follow directions below:

At a 25:1 mix your 600ml tank needs 23.1ml of 2 cycle motor oil. See the photo on the left where the red mark cooresponds to the bottom of the 25:1 mark, which is about the 575ml mark.

So fill the tank up to the 575ml mark and the balance to the 600ml mark with 2 cycle oil. It might be much easier to get a gallon of gas and add 3/4 cup of 2 stroke oil to it. In case you need some conversions here you go:

1/2 to 3/4 cup (US)= 4-6 ounces (liquid)

1/2 to 3/4 cup (US)= 117-177 milliliters

1 Gallon (US)= 16 cups

2. The next problem is the primer is not pushed. Look under the carburetor and fill the soft rubberized plastic primer bulb shown on the right. Push this 5-10 times until you see fuel running through the clear fuel line going to the carburetor. Without priming it will not start.

3. Unit flooded! DO NOT turn throttle while trying to start it. The unit should start and idle without turning throttle. On rare occasions you may need to turn throttle only slightly. If you turn too much you will flood the plug and it will not start.

4. Unit will not start after new gas. You may have fouled the plug and may need to replace it. You can order one from our service department if this is the case. Remove the spark plug and see if it is black or very wet with gas. If so it is fouled or flooded respectively. If just wet you can blow it dry and with the plug out and no throttle pull the start cord a few times. Be sure the plug wire is grounded or you may get a fire! This will help blow out extra gas and oil which may be flooding your plug. Reinsert your plug and follow starting instructions above.

5. Last hope. I strongly recommend anyone who has a 2 stroke anything always keep a can of spray starting ether on hand. This helps all of these 2 strokes come to life without pulling your shoulder out of place. Not too much or you will become a roman candle along with you cooler!!! A couple of sprays near the air filter will usually get er done.

6. It starts and then when I give it gas it dies. This is also a very common problem with 2 strokes when they are first started. This can be one of three things, 1) Too much oil in the gas, 2) Unit not warmed up yet (must idle for a few minutes), 3) The fuel air mix is not right for my altitude or area. On item #1 follow instructions above under item #1. For item #2, just let the unit warm up for at least 30 seconds before taking a spin. If this is number 3 see #7 below. It is highly unlikely that this is the problem and should only be attempted by professionals or gear heads who know what this little screw does.

7. THIS IS FOR THE ADVANCED MECHANICS & GEAR HEADS! Can I adjust the fuel mix? Yes, but it is set (glued in place) and tested at the motor factory and also at the assembly plant. So changing this setting is not recommended unless you are a real gear head. Changing this setting on a new unit will also void your warranty!!! Try all of the above at least TWICE before attempting this step.

You may notice in the small photo on the left that the mixture screw has glue on the threads, if you look closely, which makes it very difficult to get it turning. It will also turn the throttle lever because it is glued to the throttle pivot, until you break the screw loose. You can easily get to this screw from the top with your lid open.

If and when you get it free you should know that it must be glued back in or at least not turn freely or it will turn by itself and readjust your fuel air mix without you knowing it, not a good thing 20 miles from home.

If you turn it you should only turn it 1/4 turn out (counter clockwise) for more fuel or richer mixture turn in (clockwise) 1/4 turn for more lean mixture at a time. Turn 1/4 turn in the selected direction and then run unit to see if runs better. All 2 stroke gas units have what I call a “sweet spot”. This is where the unit will run best at full speed. This may or may not run good at other speeds but these new units are designed to have a broader “sweet spot” where the unit will run good at most any range but will still have high top end power, which is the desired goal. Again, this is not recommended for novices and by adjusting the fuel mix you may make the unit run worse. It is designed and tested at the factory to perform it’s best where it has been set and glued in place by the factory.

You also need to know that these carburetors are not like the old ones. They are EPA regulated to run leaner which are created to keep us gear heads from cranking them open. You can get other carburetors that are not EPA approved or performance carburetors that should bolt up. These of course void your warranty but you may get better performance from after market carburetors that are not regulated by the EPA.

I sincerely hope that this answers all of your questions or solves all of your problems. We are always here to help you and we have a complete service department ready to answer anything not answered here.

If you have any more questions or comments feel free to contact our service department at service@cruzincooler.com.

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