Giant vac leaf blower problem


Old 10-26-15, 07:39 PM
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Join Date: May 2008
Location: united states
Posts: 45
Giant vac leaf blower problem

I have a giant vac 9 hp vanguard with a Briggs and straton engine. Its an older unit but always starts right up no problem. When I put it on high/max throttle it will run great for about 10-15 minutes and than start to sputter. I have to lower the throttle down for a while before I can crank it up again. It's almost like it over heats or something. It's been like this for years but I only use it for a few weeks in the fall so I for get to look into repairing it. Not sure whats going on but would like some advise on where to look .. Thanks
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Old 10-26-15, 08:19 PM
Join Date: Aug 2015
Location: USA
Posts: 243
Fuel issue for sure. I keep saying fuel lines a lot, but that could be the problem since it runs good for a while. Your line could be bad on the inside. No real way to check it by blowing in it. A couple bucks for a new line could save you a big headache.
Old 10-26-15, 08:28 PM
Join Date: Jan 2011
Location: USA
Posts: 4,185
At least 99% of the time it's a fuel issue.
Prevention is the key to prevent future issues on any gas powered machine that gets little use.
Only use nonethenal fuel, there's thousands of places it's avalible, or at least use a fuel additive that counter acts the effects of it. Any auto store, power tool store, Lowe's, Wall-Mart, Home Depot has it.
Never ever use old fuel.
Done using the vac at the end of the year then keep it running until it runs out of fuel.
Far more likely the carb. needs to be rebuilt then the fuel lines.
Old 10-27-15, 01:00 AM
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Join Date: Jul 2001
Location: USA
Posts: 16,818
If the fuel is being used faster than it can run into the carb, this would be the result. I'd drop the carburetor bowl and watch how fast the fuel runs.
Old 10-27-15, 09:09 AM
Join Date: Jun 2006
Location: St. Louis
Posts: 2,365
Try running it with the fuel cap loose, it may not be venting properly, the leaves create a lot of dust and the vent may have become clogged. Have a good one. Geo

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