212 predator running rich

[larry g]

My engine is running rich I have a140 emulsion tube and a 36 jet in the carburetor. I have not really ran the engine it only has 2.8 hours. Most of this time is at idle for break-in period is that why it seems to be running rich and it will cure that issue when ran at more RPMs. I also have high flow air filter and Robertson boat Loop exhaust

 

[minibikin']

So it's a mud motor? Are you reading the spark plug it seeing dark smoke?


Sent from my Texas Instruments Speak and Spell...[emoji2]

 

[larry g]

Spark plug is dark it is the racing spark plug I don't see any smoke and the engine is incredibly responsive

 

[larry g]

Yes this engine will be used as a long tail Mud Motor

 

[Raskin]

my curiosity made me look OldMiniBikes non hemi predator mud boat kit see advance timing key is part of a kit..

 

[larry g]

I installed the Arc Billet flywheel that has 8 degrees advance built-in

 

[larry g]

I have not checked to see if the spark plug is still dark after changing flywheel would the advance timing cure the problem

 

[creia]

I have not really ran the engine it only has 2.8 hours. Most of this time is at idle for break-in period

Larry, That is one of the worst ways to "break in" an engine. You always want to vary rpm and put a load on the engine (read: ride the bike) as well.
Michael

 

[larry g]

I did not know that but I am new to this and it is my first build. I am going to buy another predator212 and build it to a stage 4

 

[minibikin']

Larry I'm not a fan of those plugs at all. They are difficult to read at best. My advice is to start with a NGK. As Michael said. Varying rpms is the way to go during break in in my opinion. Heat cycles help as well.


Sent from my Texas Instruments Speak and Spell...[emoji2]

 

[larry g]

Thank you to all that replied I will get an NGK plug and check it after a few hours and let you all know the results

 

[SLJ2137694]

To properly seat a new ring you need to build cylinder pressure by changing the load on the engine. Just letting it idle may glaze the cylinder and make proper ring break in difficult.