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Hot!How to adjust (reduce) engine speed on older B&S engine with no throttle control lever?

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bugman58
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2018/04/13 21:04:37 (permalink)
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How to adjust (reduce) engine speed on older B&S engine with no throttle control lever?

I have an old (1985) Homelite AP520 farm pump (pumps water from one pond to another, etc), that has a 5hp B&S engine (Model 130232, Type 1638-04, Code 85012807). When you crank the engine it just goes to top speed, there's no throttle control on it, it does have a mechanical governor that keeps it running a a constant speed (adjusts for the water load).
 
I want to slow the engine down so the pump makes less pressure, so I can put a fire hose nozzle on the end of the 2" flexible hose (when I do this with engine running a normal speed, the hose swells up REALLY TIGHT, I'm afraid it's gonna pop!).
 
I can slow the engine down a bit by closing the choke some - and that does help a little - but, that's not good for the engine, right? How long could I run it like that before some damage might be done - seconds?... minutes?
 
Thanks for any ideas!!

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    Roy
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    Re: How to adjust (reduce) engine speed on older B&S engine with no throttle control lever 2018/04/13 23:25:34 (permalink)
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    All you will do is stall the engine. The unit is not designed to run a closed system, fire pumps have an unloader (like pressure washer) that cycles the water back to the inlet when the nozzle is shut off.
    bugman58
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    Re: How to adjust (reduce) engine speed on older B&S engine with no throttle control lever 2018/04/16 10:29:43 (permalink)
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    Thanks... :-(
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