Re: Help with B&S engine electrical issue

bob <boboranntrottier@xxxxxxxxxxx> wrote in message
news:Iz9qi.9193$XL4.3626@xxxxxxxxxxx
May be off subject if so let me know where else to post
I have an Ariens ZTR 1742 mower with a 17 HP B&S engine that has been
afterfiring ( After ingnition is turned off raw gas collects in the
muffler
and explodes) since I got it .This destroys the muffler and I need replace
another $90 one so I thought I'd look into why its happening.
When I checked into it there is an afterfire solenoid on the carb that is
supposed to shut off the fuel supply when the ignition is turned off.
Ariens
didn't do this and as a result the solenoid which is powered from the
alternator does not disengage until the alternator ( and engine ) has
almost
stopped so I get feul in the muffler.

When I called Ariens they admited to the problem and sent me a new
ignition
switch that is supposed to fix the problem. When I got it it was clear
that
this would not switch teh solenoid power and when I called again I was
told
that the fix was internal to the switch and did not need any cabling.

When I pressed for how it was done teh engineer told me that rather than
switch off the solenoid they simply shorted it to ground when teh ignition
was turned off.
While I agree this will fix the afterfire it does so by applying a short
across the alternator while its still at speed.

So my question is am I trading a annual muffler replacement for a much
more
expensive Alternator problem down the road
Thanks
in Advance
Bob



I own an ancient Hayterette with a B&S engine.
Not prone to back/misfires but to stop it I just pull the HT cap off the
spark plug. As originally a bare metal cap I adapted an old bakelite knob to
cover it.
I've always the opposite problem - starting , as usual with these mowers, to
start - its always take off the airfilter cover and teaspoon of petrol in
the inlet chmber. Apparently something to do with a carburetor that can be
taken up and down slopes without playing up.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/


.

Relevant Pages

  • Re: Help with B&S engine electrical issue
    ... I have an Ariens ZTR 1742 mower with a 17 HP B&S engine that has been ... When I checked into it there is an afterfire solenoid on the carb that is ... switch that is supposed to fix the problem. ...
    (sci.electronics.repair)
  • Re: Help with B&S engine electrical issue
    ... I have an Ariens ZTR 1742 mower with a 17 HP B&S engine that has been ... When I checked into it there is an afterfire solenoid on ... solenoid which is powered from the alternator does not disengage until ...
    (sci.electronics.repair)
  • Re: Briggs/Stratton 4 hp Quatro
    ... The Honda is prone to the exact same problems. ... with a lawn mower engine, or you hire someone else to do it for ... Honda engines are very well made and would be my engine of choice, ... On an MTD 21 " mower, ...
    (alt.home.repair)
  • Re: Which small Engine is Better - Briggs / Tecumseh?
    ... that the Tecumseh engines are much better. ... seemed that every mower had a Briggs engine. ... I just got another mower with a crappy Briggs engine. ...
    (alt.home.repair)
  • Re: Snow blower power ratings
    ... Power" ratings are so that old geezers like myself can understand ... conversion of Foot Pounds or CC's to Horse Power? ... blower will have the same engine across all the house brands. ... The Ariens line is pretty top notch stuff (or at least it was when I ...
    (alt.home.repair)
Loading