i'm stumped-engine question?

[erwine13b 27]

my 310-8 fires on the first few cranks when cold no problem barely have to choke, but when the engine is hot it cranks and cranks then spits out black smokes and sputters to full rpms. Any ideas on what could could be causing this? i know you guys are like a book on this forum.

[Digger 66 3,488]

Choke butterfly opening all the way ?

[squonk 43,710]

Float level, mixture setting. Your engine is getting way too much fuel. That's why it starts right up when cold with little choke.

[wallfish 18,053]

Black smoke is excess un-burnt fuel.

[prondzy 3,889]

Clean the carb and lean it out a little

[erwine13b 27]

so basically you guys are telling me i need to adjust he carb a little? sorry dont know the lingo lol

and tyvm gentlemen 

[Tuneup 1,451]

Hi erwine,

She's clearing her throat from excess fuel when warm. Hey, it's just an opportunity to spend some time with your machine. It wants some lovin'. There are the usual checks - choke stuck in the ON position - very dirty air cleaner. Was the carb adjusted when the engine was cold? Was it adjusted with the air filter removed? Warm it up and adjust the carb and then see if it clears. If not, pull the carb and clean it - solvent and compressed air through the passages. Don't get any solvent on the gaskets. With today's fuel quality, you might find some trash in the bowl.The float is an on/off valve for the fuel level and the level is too high the engine will be rich so it's good to get in there and verify the adjustment and to ensure that the valve (needle and seat) isn't clogged or dirty. Once you have it clean and the float adjusted to the right level - the manual for the Magnum 10 is on this forum - put her back on there and adjust it when warm.

[wrightorchid 261]

Check your fuel lines, tank, and filters, since these can cause havoc also.  I cleaned up a carb, only to have trash in the tank clog the lines.  

[erwine13b 27]

4 hours ago, Tuneup said:

Hi erwine,

She's clearing her throat from excess fuel when warm. Hey, it's just an opportunity to spend some time with your machine. It wants some lovin'. There are the usual checks - choke stuck in the ON position - very dirty air cleaner. Was the carb adjusted when the engine was cold? Was it adjusted with the air filter removed? Warm it up and adjust the carb and then see if it clears. If not, pull the carb and clean it - solvent and compressed air through the passages. Don't get any solvent on the gaskets. With today's fuel quality, you might find some trash in the bowl.The float is an on/off valve for the fuel level and the level is too high the engine will be rich so it's good to get in there and verify the adjustment and to ensure that the valve (needle and seat) isn't clogged or dirty. Once you have it clean and the float adjusted to the right level - the manual for the Magnum 10 is on this forum - put her back on there and adjust it when warm.

tyvvvvvvvvvvm tuneup i'll follow this to the T and post back the results everyone that commented is awesome!

[erwine13b 27]

carburaer was problem sorr m keboards broke lol some kes don work haha, he carb jus needed adjusing

 

[Tuneup 1,451]

So glad you got her running! Keep the keyboard - fun reads.

[erwine13b 27]

On 7/11/2016 at 6:49 AM, Tuneup said:

 Keep the keyboard - fun reads.

haha

anoher hing ive noiced is i have air bubbles in he hose under he carb when is warm, how bad is ha ?

[lynnmor 7,788]

There is no hose under the carb.  The fuel hoses are rubber, so you can't see bubbles anyway.  Now ask about the fuel filter.