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  #1  
Old 10-29-2009, 05:43 PM
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TurfConcepts,Inc TurfConcepts,Inc is offline
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Stihl FS 75 not priming

I have a 2007 FS75 edger that will not prime. I've rebuild the carb, replaced the fuel lines and filter. I also replaced the primer bulb base. It did prime once right after I rebuilt the carb and ran like a champ but as soon as turned it off the primer bulb drained out. I tried to prime it again and nothing, it's dead. Any ideas on what else I can check?
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  #2  
Old 10-29-2009, 06:17 PM
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Two Seasons Two Seasons is offline
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Is your return line ok?
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  #3  
Old 10-29-2009, 06:30 PM
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Yes, I replaced that too.
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  #4  
Old 10-29-2009, 07:51 PM
topsites topsites is offline
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Try this...

Reverse the two fuel lines.

Ain't got nothing to lose but a few minutes, just reverse them at the carb, pull both off then re-insert in the reverse order.

It's possible they may have gotten hooked back up wrong when you replaced them,
not saying you would do that but it's also hard to tell once they're hooked up which is what...

And I can tell you if they're hooked up backwards your trimmer will run like crap lol
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  #5  
Old 10-29-2009, 08:03 PM
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TurfConcepts,Inc TurfConcepts,Inc is offline
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Yeah, that's not it. It ran right after the carb rebuild then it lost its prime and won't reprime. I am thinking it might be the check valve in the carb. Is it new carb time? If so who has them the cheapest?
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2005 F-150 SuperCrew
6x12 Open trailer
48" Lesco Walkbehind
60" Bad Boy Pup 30hp Kohler
Little wonder Street Blower
Too many Stihl products to list
A Farmer's Tan
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  #6  
Old 10-29-2009, 09:35 PM
mowerknower mowerknower is offline
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yep sounds like its carb time. Probably looking at a 60 dollar carb.
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  #7  
Old 10-30-2009, 05:56 AM
superbee superbee is offline
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Fs 75

Exact thing happened to my Stihl. Had to replace the whole carb. Hope this helps.
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  #8  
Old 10-30-2009, 11:03 AM
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jkilov jkilov is offline
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Quote:
Originally Posted by TurfConcepts,Inc View Post
I am thinking it might be the check valve in the carb. Is it new carb time?
On most carbs the purge check valve is located at the bulb base, clean it if you have'nt done so already. I'm not sure if the base assy. can be ordered as a separate part or not.
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  #9  
Old 10-30-2009, 09:02 PM
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Quote:
Originally Posted by jkilov View Post
On most carbs the purge check valve is located at the bulb base, clean it if you have'nt done so already. I'm not sure if the base assy. can be ordered as a separate part or not.
I don't know why that part can't be bought separately.....they don't fail often but do fail. And blowing air in the wrong hole can blow it out.
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