Need help with Intek Engine

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mthomas

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I have a 6.5HP Briggs Intek engine (came off of a tiller). I removed the stock throttle mechanism and connected a cable directly to the butterfly. I then added a return spring. This setup actuates well. My problem is that the engine dies when I take the choke off. As a matter of fact, I have to move the choke to position #2 (barely open) to get it to start and run. If I move the choke further open, it dies. I only see an idle adjustment, nothing else. I have cleaned the carb and all of the orifices are clear. Any suggestions?
 

Jasoninsane123

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just to give you a heads up i heard that the intek motors don't work good on gokarts i have the intek 190 6hp motor that im working on but not yet tested it on my kart
 

mthomas

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This engine uses a carb with a float bowl. The carb has one main fuel metering orifice - the main jet. It is a brass piece that screws onto the bottom of the float bowl. It has two holes perpendicular to the main hole. The two small holes take fuel from the float bowl and transfer to the large hole that feeds the body of the carb (and into the intake of the engine). I see no other means of changing the amout of fuel to the engine, so that means that it is working on vacuum pressure. The more you open the butterfly, the more vacuum you create and you should pull more fuel through the main jet. Unfortunately, this calibration appears to be off on my carb. I was able to get it to run, but I had to toggle the choke while I manually adjusted idle (butterfly) - really high. By doing this, I was able to get it to run. The problem is you can't slow down to an idle and I almost smoked new clutch on the cart! I have soaked the carb in carb cleaner for days, blown it out with compressed air and even ran a tip cleaner through all of the orifices. Still no change! Any help would be appreciated.
 

mthomas

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Fyi...

I also did a compression check...100PSI. Next I am going to do a leak down test to see if the valves are in good shape.
 

motor_head

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your mixtures off on those stupid carbs without adjustment screw all you can do is adjust the float level
 

slideways

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Sounds like the carb is clogged somehow. What you did with the throttle shouldnt affect how it runs. I'd take it off and blow out every passage and try again.

Just FYI: I used one of these on a kart and it ran great. I've also had them on all kinds of equipment and sold them on equipment and have never had one with a hiccup. The Inteks are very good motors.
 
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