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Troy Bilt generator conversion help

4.9K views 3 replies 3 participants last post by  Packitup  
#1 ·
I'm considering converting my generator to tri fuel. I have a Troy Bilt 3550 generator that I have had around 10 years but still looks brand new and works great. It has a Briggs and Stratton 6.75 hp OHV pull start motor. I would like to find a kit for this or at least a place I can piece together a kit. I can do it all myself but I don't know if they even make a kit for it.

I have seen smaller engines with a ball valve and a straight shot line to the carb and if that is possible I would like know that as well.

Any and all help is much appreciated.
 
#3 ·
Anyway if there is a way cheaper than $187 bucks I'm all ears. thanks
I tend to discourage multi-fuel conversions. It's an efficiency losing compromise which yields less than satisfactory results. For LPG/propane only, you'll need...

... either a Garretson KN or Impco model J regulator. The Garretson regulator is only a single stage, so that route requires a second, high pressure reg. It's also more expensive. The Impco model J is a dual stage reg, so purchasing a second reg is unnecessary - the Impco however, requires replacing the blue spring for an orange one (about $3).

http://www.ebay.com/itm/IMPCO-MODEL...RTOR-REGULATOR-SILICONE-/260973116873?pt=LH_DefaultDomain_0&hash=item3cc335bdc9

After you buy the regulator, you'll need to modify the carb. This entails replacing the gasoline main jet (spud) with a one that has a larger orifice. (scroll down about half a page):

http://theepicenter.com/tow102899.html

These folks list the carb jets, 'spuds':

http://www.propanecarbs.com/small_engines.html (scroll down 1/2 page)

Another option which doesn't require carb mods, but is also less efficient:

http://www.otherpower.com/otherpower_propane_convert.html