When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Hi All, my wife's 2003 Hugger engine has a habit of running a few seconds after she turns the key off. She has been using 87 octane gas, and someone mentioned that she should ty hightest. Doesn't seem like that would be the issue to me, but she did try a tankful of 93 octane to no avail. Any thoughts on waht it could be? I am thinking a slight carb adjustment...
What you have is called dieseling and can be caused by several things. Too much fuel in the combustion chamber when you shut it off is one cause. Another is carbon buildup on the heads. Get a can of Seafoam from an auto parts store. There are directions on the back of the can, but the ones you are looking for call for injecting the seafoam into the air intake with the engine running. Follow that procedure and see if it helps.
Might need to check the timing too. Could be too advance. Makes a motor run hot and exacerbates the dieseling. Check the plugs for an indication. Not sure about your choice of octane. Higher burns slower (if memory serves correctly), and cooler. It will take more than "a tank" to affect it much. Lots of good tuning information at nightrider.com
you want to pull your carb off and replace the seals to the manifold, its hard to get a perfect seal with the way they are designed and a small nudge will make small leaks which cuase this exact problem
i had to deal with it 3 times and i JUSt replaced the seals again yesterday and now my bike doesnt diesel anymore, I have to check the bolts after every ride for the next few days to make sure nothing comes loose.
you need a 1/2inch box wrench and at least 7inch long 1/4inch bal ended allen wrench, and a pipe wrench to grab the small end of the allen key to turn it.
you might be able to get away with just tightening the bolts, see if they came loose.
also seafoam will remove a lot of carbon from inside the engine, use it every other tank just becuase it helps so much
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.