Go kart is hard to start when cold why

[dictionary6767]

Hi,
Its a older Yerf dog go kart with a 6.5 engine. Its extremely hard to start when cold, but when warmed up start right up. what could it be?
Thanks in advance

 

[KieranM]

What temp is cold, every engine struggles to start when its cold, as its harder for the mixture to burn, nothing to worry about in my opinion.

 

[MacfarlaneRacers]

If Your Talking like 1*c then you may have a problem. But if your talking about -6*C or sumthing it will just be what Kieran Said !

 

[Doc Sprocket]

Much of this depends on your definition of "extremely hard". 2 pulls? 20? 50?
Does your engine have a choke, a primer, nothing?

 

[Russ2251]

What grade oil are you using?

 

[dictionary6767]

15w-40

 

[devino246]

15w-40

Sounds a bit thick.

 

[Russ2251]

Engine make was not specified. If it is a clone, 5w-30 should be used when below freezing...10w-30when above freezing. Avoid oils which have a 40 grade rating (such as 15w-40) unless manual specifically calls for it.
Some engine manufacturers will void warranty if a 40 grade oil is used.

 

[Joshua121]

Have you tryed turning the choke on?

 

[sideways]

Any engine mods, if so, did you re-jet the carby?

 

[dictionary6767]

Any engine mods, if so, did you re-jet the carby?

No mods. Is it good to rejett the carb

 

[dictionary6767]

Have you tryed turning the choke on?

No it's a electric choke.

 

[Doc Sprocket]

No mods. Is it good to rejett the carb

Re-jetting the carb on a bone-stock engine shouldn't be necessary.

 

[Clayton]

I had the same problem with my clone. It just wasn't getting enough fuel.

Check the sediment cup if it is not full with fuel, then turn the fuel on/off valve on and see if any fuel comes out. If there is very little then check the fuel line, the fuel on/off valve, and right inside the tank for blockage.

If there is not blocakge, loosen the screws that hold the top plate on the fuel on/off valve a little (not too much). That's what I did and it worked, problem solved.