[AT] Need some help, hard starting CR950 Briggs
Stuart Harner
stuart at harnerfarm.net
Tue Feb 15 08:24:45 PST 2022
So what you are saying is that you are stuck with ether or...?
Sorry, couldn't resist. :)
On 2/15/22 10:14, Cecil Bearden wrote:
>
> There are 2 types of ether starting fluid. 20% and 50%
>
> Cecil
>
> On 2/15/2022 8:19 AM, Indiana Robinson wrote:
>> Thanks guys...I need to use it this week and maybe next week. I'll be
>> trying some things, especially Steve's LP trick. I wonder where I put
>> those torches. :-)
>> One thing on my side now is that it will be 50 degrees today and 60
>> tomorrow. I may not need anything extra. I do know that one problem
>> is the thick oil in the tank and it not having a way to clutch out
>> the pump for starting.
>> I'll try to keep you posted.
>>
>>
>> On Mon, Feb 14, 2022 at 9:59 AM Stuart Harner <stuart at harnerfarm.net>
>> wrote:
>>
>> Remember the old fire triangle? Fuel-Air-Heat.
>>
>> With the ever more restrictive regulations filtering down to the
>> smaller engines the manufacturers have had to lean out the mix as
>> far as possible. If you were to put a pyrometer on one my guess
>> is that at operating temperature they are running on the lean
>> side of peak.
>>
>> As air temp drops it gets more dense but without a choke to
>> compensate the mix is just too lean to light off. To make things
>> worse they have taken all of the adjustments away from the end
>> user to prevent us from becoming criminals against the
>> regulations. I suspect it also makes the carbs easier and cheaper
>> to manufacture. If a bad one slips through, just replace it or
>> the engine because it is cheaper than figuring out the problem.
>> We see this in a lot more then carburetors.
>>
>> Changing to a lighter hydraulic fluid will help make it easier to
>> spin the engine faster when pulling the starter. I am not sure if
>> that will help make a hotter spark or not considering it probably
>> has electronic ignition anyway. Faster starting RPM could help
>> with sucking in more fuel each stroke but then that means more
>> air to, so back to lean.
>>
>> I suspect that Farmer's engine sputters once in a while is that
>> the raw fuel builds up enough in the cylinder to cause a rich
>> enough mixture to fire once or twice. Once that is burned off,
>> back to square one.
>>
>> I am not sure that adjusting the valves would help any unless
>> there is a way to lengthen the duration. Taking out all the
>> backlash might cause the valve to open a fraction sooner, but
>> once everything is warm and expanded there is a risk of it not
>> closing fully and burning the valve or seat.
>>
>> To get a more rich mixture for starting you could try to restrict
>> air (like the old choke plates did) or add fuel like a primer does.
>>
>> I have a Knipco stye heater that will not light off at any air
>> temp unless I use both hands and cover as much of the air intake
>> as possible. It lights in less than a second and then runs fine.
>> I have tried different nozzles and moving the igniter around, but
>> it still needs less air to get going.
>>
>> On the 1978 motorcycle I once had it was a victim of early
>> tampering with emissions on motorcycles. When new it would not
>> start on a cool day and it had a manual choke. I rigged up a way
>> to inject a little ether into the airbox that was buried under
>> the seat. Had to put 10,000 miles on that bike before it got over
>> that problem.
>>
>> The idea of using an unlit torch to add a little fuel sounds like
>> a good one. Red Green would just slap a little piece of duct tape
>> on the air intake until it warms up.
>>
>> Best of luck to Farmer getting this working.
>>
>> Stuart
>>
>>
>> On 2/14/22 01:34, Greg Hass wrote:
>>> I have a JD Zero Turn with 27 hp. Briggs engine and electric
>>> start. Anything around 45 to 50 degrees and it just wouldn't
>>> start. It does not idle good either, but the book says that is
>>> because of emissions control. My brother has a Simplicity zero
>>> turn 3 years old and several times has tried to start it in 40
>>> degree and it just won't fire so it is not just my mower. Both
>>> engines have fixed jets so no adjustment is possible. It is
>>> possible other things could be wrong, but my only other idea is
>>> to make sure it has fresh WINTER blend gas.
>>> Greg Hass
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> On Sun, Feb 13, 2022 at 8:15 AM Moe Fretz <tubetester at gmail.com>
>>> wrote:
>>>
>>> Try this site, they should be able to help you.
>>>
>>> http://ppeten.com/forums/search.php?search_id=newposts
>>>
>>>
>>> On Sat, Feb 12, 2022 at 18:51 Mike M <meulenms at gmx.com> wrote:
>>>
>>> Hi Farmer,
>>> Just a thought, my log splitter was hard to start in
>>> cold weather, until I changed the hydraulic fluid from
>>> the OEM fluid to transmission fluid,a whole world of
>>> difference.
>>>
>>> Mike M
>>>
>>>
>>>
>>>
>>> On 2/12/2022 9:24 PM, Stephen Offiler wrote:
>>>> Hi farmer: I'd have to think you've already been down
>>>> this road, but, I'll say for the record that I've had
>>>> pretty decent luck downloading manuals from the Briggs
>>>> site. But I haven't done it lately, and it's always
>>>> 20-year old stuff when I do. The other thing I'll
>>>> mention is the good old unlit propane torch in the
>>>> intake trick. That's my go-to when they're almost
>>>> trying to start. There's spark and fuel but the modern
>>>> carburetors are set lean for emissions and it just
>>>> seems that the choke doesn't quite get the mixture rich
>>>> enough.
>>>>
>>>> Good luck,
>>>> Steve O.
>>>>
>>>> On Sat, Feb 12, 2022 at 7:43 PM Indiana Robinson
>>>> <robinson46176 at gmail.com> wrote:
>>>>
>>>> We have a log splitter a couple of years old that
>>>> has a OHV CR950 Briggs. It only has a few hours on
>>>> it but has become quite hard to start (recoil
>>>> start). It is way too recent for my knowledge
>>>> base... It seems that most things are these days.
>>>> Apparently the OHV Brigg's have a cam bump
>>>> "compression relief" I also understand that there
>>>> is an important valve adjustment procedure that can
>>>> normally improve starting problems. We can't find a
>>>> site that gives a clear and understandable
>>>> explanation of the procedure.
>>>> Does anyone know of a site with a clear description
>>>> of how to do it? It will usually start if it is
>>>> sitting in the sun and the temp is at least 50...
>>>> Yesterday at 45 degrees it "ALMOST" started 837
>>>> times... It keeps firing enough to keep you trying
>>>> and trying...
>>>> Thanks
>>>>
>>>> --
>>>> --
>>>>
>>>> Francis Robinson
>>>> aka "farmer"
>>>> Central Indiana USA
>>>> robinson46176 at gmail.com
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
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>>> --
>>> Moe Fretz
>>>
>>> L’Orignal ON,
>>> Canada
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>>
>>
>> --
>> --
>>
>> Francis Robinson
>> aka "farmer"
>> Central Indiana USA
>> robinson46176 at gmail.com
>>
>>
>>
>>
>>
>>
>>
>>
>>
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