Converting A Fixed Speed Briggs Motor (carb) To Variable Speed
Posted November 24, 2012 - 04:43 PM
Anyway, I want to convert this to have a variable speed throttle, run off a cable for a piece of equipment. I don't have access to the motor at the moment, or have the model numbers (or pictures) handy..... Also, this is NOT replacing a similar motor that I can steal parts off to convert it...
Aside from the lack of a lever (and hardware to mount it) to adjust the throttle butterfly, would this carb be any different from one used on a variable speed engine?
Could I buy/adapt parts to convert my existing carb? Also, would the governer linkage be different (seems like it would be...)?
Perhaps the easiest (although not the cheapest..) thing would be to get a new carb with the proper linkage on it... But a new carb wouldnt be cheap...
Any suggestions or has anybody else ever been down this road?
Posted November 24, 2012 - 06:23 PM
Posted November 24, 2012 - 07:29 PM
Posted November 25, 2012 - 02:47 AM
Posted November 25, 2012 - 10:03 AM
Posted November 26, 2012 - 08:42 PM
That play is supplied at the "control panel" most engines have on the side of the carb - where the throttle and choke levers are located. My engine doesn't have one of those panels. The cutoff switch for the engine is an actual switch mounted in the housing/tinwork on the top of my engine. Thinking I could buy/adapt one of those panels and graft it onto my engine.
I was not sure though if the constant speed carb is "optimized" for a specific speed - and would be unresponsive for less than full throttle adjustments? For example, a racing carb may be set up to rum best at a rpm band, but be fairly crude running below that band.... Just wondering if my constant speed engine carb is similar - or if it is the same carb as a variable speed engine, just missing the controls and linkage....
Posted November 26, 2012 - 09:51 PM
Posted November 26, 2012 - 10:21 PM
just a thought
Posted November 26, 2012 - 11:58 PM
Jehtro, I may end up going that way and getting a new carb. But the cheapskate in me would rather use the existing (paid for, working) carb I have if possible. Also, while not "rare", I havent seen a lot of these around used..... Seems easy to find smaller or bigger carbs, but this is a less common size... New would be big $$$$$!
I have a couple control panels from trash engines that I could use.....