Tillotson Carburetor Flooding

[louye2]

Carburetor Repair

The hole comes out just beyond the butterfly valve. I have filled it with Permatex Ultra Silicone (Hi Temp and Oil resistant) sealant. I used this stuff when I replaced the valve cover gasket on my car. The cure time is 24 hours, so I'll let y'all know what happened when I put everything back together.

Thanks again for the good advice.

 

[cedarshark]

The hole comes out just beyond the butterfly valve. I have filled it with Permatex Ultra Silicone (Hi Temp and Oil resistant) sealant. I used this stuff when I replaced the valve cover gasket on my car. The cure time is 24 hours, so I'll let y'all know what happened when I put everything back together.

Thanks again for the good advice.

What about gas resistant ?

 

[pioneerguy600]

After checking my Tillotson Master manual I found that the 107B is a 1/2" venturi carb, they are rather small for the HS series carbs and there is only one other HS carb with a 1/2" venturi, that is the HS-81A. I hope your repair holds but I have yet to see a repair of the channel under the Welch plug work properly after being damaged.

 

[PB]

I have a few SL9 parts saws kicking around and could probably part with a carb if you need one. Send me a PM if you do need a new carb.

 

[cedarshark]

I have a few SL9 parts saws kicking around and could probably part with a carb if you need one. Send me a PM if you do need a new carb.

Very kind offer. Nice of you. OP should take you up on it.

 

[louye2]

Carburetor Woes

I just reinstalled everything and the saw actually ran for a few minutes. But gas was still flooding the enclosure. It appears to be spurting out from the spot where the carb joins the body of the saw and the gas tank. I used the new gasket that came with the kit (kind of a stretched triangle). However, I think the old gasket was more of a square that covered the entire area over the gas tank.

Could the kit company have included the wrong gasket? I'm about to give up and just buy an electric saw!

Lou

 

[PB]

Those intake gaskets rarely work. They are a generic gasket that are supposed to fit a wide range of applications but I have yet to find an application that they fit. I have a pile of them in my parts bin that have never been used. It is always best to reuse the old gasket if at all possible.

 

[louye2]

DIY Gasket

Can I make my own gasket using leather punches and an X-acto knife? What material should I use?

Paper? Cork? Karropak? Other stuff at the local auto parts store?

Thank you.

 

[louye2]

SL-9 running again

Thanks to PB who sent me a used HS107A carb, the SL-9 is running again. I rebuilt it using the RK-20HS kit. The bottom diaphragm seemed to have defect on the pin because it was not slotted and therefore rested on top of the pin lever rather than inside the U part of the lever. So, the parts store gave me a bottom diaphragm from a RK-23HS kit. This diaphragm fit perfectly.

I learned that one has to be very careful rebuilding these diaphragm carburetors. The top section is Metal Cover --> Gasket --> Diaphragm, whereas the bottom section is Metal Cover --> Diaphragm --> Gasket. I had reversed the bottom section on my first rebuild.

I also reused the original intake gasket on the second rebuild which covered the entire back side of the carb rather than the new gasket which only partially covered the carb.

There has been no leaking or flooding and the chainsaw is working very well. I still need to fine tune the idle, hi and lo settings and will watch a YouTube video or find a good thread on carb adjustment on this site.

Thank you to everyone and especially to PB for cheerfully providing such great advice.

regards,

Lou

Can I make my own gasket using leather punches and an X-acto knife? What material should I use?

Paper? Cork? Karropak? Other stuff at the local auto parts store?

Thank you.

 

[mike southwell]

I recently rebuilt the Tillotson carburetor (HS 107B 605) in my Remington SL-9 chainsaw. I used the R3644 kit (replaces the RK-23HS).

I was pretty meticulous about following the instructions in the Tillotson HS service manual. When tried to startup the saw today, it ran for a few seconds and then died. I tried starting it a few times more, but it just does not start. I checked the carburetor compartment and it was flooded with about 1/4" of gas.

I've cleaned up the mess and let everything dry out for a few days. What do you suggest I do now?

Could this be a leaking fuel line problem? Should I focus on the inlet needle valve? Do I really need to remove the carburetor and do another rebuild? I'm pretty frustrated right now!

Thank you for your advice.

 

[mike southwell]

Be very wary of the new spring that comes with some of the carb kits. I had persistant flooding that did my head in, turned out the new spring[under the needle valve lever] was a lot weaker than the original. My fully restored pioneer 3270 actually caught on fire and burnt the new paintjob off, not happy