039 needs to sit in sun to start

[Jungleman]

That’s right folks you read the topic correct.
Why would a chainsaw have trouble cold starting but then run fine once it is warmed up?

I recently went to visit my family farm and when I went to get my old Stihl 039 to fire it up and go cut some posts I heard my Mother yell out the window “you have to let it heat up in the sun for a bit!” Not something I’ve ever heard about a chainsaw..... It was difficult to start though. When I left it there years ago it would crank with full choke by the 4th pull. Then pop it up one notch and 1 or 2 pulls would get it roaring. Seems every time I am not the sole operator on a chainsaw something goes wrong with it. This is a saw I bought used/refurbished about 10 years ago and I used it for years with no problems.

I took out the carb and checked it out and it didn’t look too bad but I’m planning on taking a carb kit and changing out the gaskets anyways. Once I got it started and running I used it for about 3 hours straight with no issues and it fired up every time. The next day the same thing. I figured i could get it started but it took a while before it fired up. Definitely some small little repair that I could do myself if I knew what the issue is.

Would it need a new coil? You can go ahead and treat me like a rookie mechanic, I won’t mind!

 

[huskihl]

Choke isn’t closing completely or maybe needs fuel filter, fuel line and a carb kit

 

[Jungleman]

Perfect. Thanks.

 

[stretch5881]

Sitting in the sun allows the fuel tank to warm and build a slight amount of pressure and helps out a weak fuel pump.

 

[Jungleman]

Fuel pump? I think I missed that memo..... where’s the fuel pump? Or again is that in reference to the carb.

 

[huskihl]

Fuel pump? I think I missed that memo..... where’s the fuel pump? Or again is that in reference to the carb.

It’s in the carb. Part of the carb kit

 

[AVB]

As huskihl said it is likely your starting problem is that the rubber parts in the carburetor has stiffen especially if it has been sitting several years. What I usually find on carburetors like these that have sit a long time is the fuel pump flaps tend to curl up and the metering diaphragms get stiff. At least the K10-HD repair kit is fairly reasonable even if it not the main source of the problem.

 

[Jungleman]

Thank you to everyone for all the tips and advice. I appreciate it.

I think I'll just go ahead and buy a new carb from the HL Supply website. The farmertec one.

Soon I'll be pestering you all asking about this 15 year old Stihl 066 that I want to put in a new P&C. It's got sentimental value as it's the first brand new chainsaw I ever bought. Yet another saw I left on the family farm and it was ruined by the workers who used it. It's been sitting unused for over a decade... I took it apart myself but don’t have the proper tool to remove the cylinder yet.

 

[jacob j.]

039 needs to sit in sun to start

I know a few people that are like that.

 

[Jungleman]

And some people need caffeine and nicotine...

 

[CR888]

Ya I had a saw like this once, before it would start up & run, I'd have to make it a sandwich. Then it started demanding beer half way through the day. Got rid of the fat damn lazy thing....I get it.

 

[67L36Driver]

I had a client’s Husky 562 with a bad purge bulb. Lay it over on its right side so the fuel could run into the carb. Then It would start.

Finally put in a new one.

 

[67L36Driver]

I had a client’s Husky 562 with a bad purge bulb. Lay it over on its right side so the fuel could run into the carb. Then It would start.

Finally put in a new one.