[AT] Kinda Antique Tractor Question
Cecil Bearden
crbearden at copper.net
Sat Nov 30 16:10:07 PST 2019
As I remember
R-resistor plug
S-taper seat ( Why they did not use T I don' know)
17- Heat range
Y- Extended Reach
X- this used to be over sized gap such as 0.060
You could try a pair of H-10 equivalents and see if it ran oK.... On
some of the older air cooled engines if the spark plug was too close to
the piston it would burn a hole in the piston.... That is from my old
ONAN generator repair days....
Cecil
On 11/30/2019 3:51 PM, craig.warner47346 at frontier.com wrote:
> So much for that theory. I bought replacements and they don’t have
> washers. They’re tapered plugs. Oh well, I’ll install these and see
> what happens. Prescribed plug is Champion RS17YX. I got the cross
> referenced NGK TR5/2238.
>
> I bought it used from my neighbor a few years ago. Great little
> tractor other than I’ve had to replace a bunch of hydraulic hoses.
>
>
> Sent from Frontier Yahoo Mail for iPhone
> <https://overview.mail.yahoo.com/?.src=iOS>
>
> On Saturday, November 30, 2019, 3:35 PM, Phil Auten
> <pga2 at basicisp.net> wrote:
>
> Glad you were able to find the problem, Craig. Those washers
> aren't supposed to come off, but they obviously did somewhere. Did
> you buy the unit new or used?
>
> Phil in TX
>
>
> On 11/30/2019 11:52 AM, craig.warner47346 at frontier.com
> <mailto:craig.warner47346 at frontier.com> wrote:
> The winner is....no washers on plugs. What a dumbass mistake. They
> rarely fall off and o never thought to check. Too bad there is
> nobody to blame other than me. Thanks guys.
>
>
> Sent from Frontier Yahoo Mail for iPhone
> <https://overview.mail.yahoo.com/?.src=iOS>
>
> On Saturday, November 30, 2019, 11:57 AM, Jim Becker
> <mr.jebecker at gmail.com> <mailto:mr.jebecker at gmail.com> wrote:
>
> My exact thought too. It seems more likely that a set of
> projected tip plugs were installed where there isn’t enough
> room for them.
> Jim Becker
> *From:* Stephen Offiler
> *Sent:* Saturday, November 30, 2019 10:53 AM
> *To:* Antique Tractor Email Discussion Group
> *Subject:* Re: [AT] Kinda Antique Tractor Question
> The thing about the carbon hypothesis is that this is a twin,
> and it's happening on both cylinders, sounds like both
> affected equally. Doesn't seem like a random chunk of carbon
> causing the issue would occur equally in both.
> SO
> On Sat, Nov 30, 2019 at 11:37 AM deanvp <deanvp at att.net> wrote:
>
> It could be carbon floating around in the combustion
> chamber but also consider that when the engine warms up
> expansion might cause zero clearance between the ground
> side of the plug and the piston or valve. Check to see
> what are the recommended plugs vs what are currently
> installed. Also consider high RPM might play a role as well.
> Sent from my Verizon, Samsung Galaxy Tablet
> -------- Original message --------
> From: craig.warner47346 at frontier.com
> Date: 11/29/19 9:32 PM (GMT-08:00)
> To: Antique Tractor Email Discussion Group
> <at at lists.antique-tractor.com>
> Subject: Re: [AT] Kinda Antique Tractor Question
> I don’t know a whole lot about the engine... not sure if
> it’s OHV or not.
>
>
> Sent from Frontier Yahoo Mail for iPhone
> <https://overview.mail.yahoo.com/?.src=iOS>
>
> On Friday, November 29, 2019, 8:17 PM, Phil Auten
> <pga2 at basicisp.net> wrote:
>
> The first thing that comes to mind is the piston
> contacting the ground terminal of the plug. But if
> that were the case there would be noise, I would
> think, and the starting would revert to terrible
> quickly. Perhaps there is a piece of carbon floating
> around inside the cylinder that occasionally gets
> pinched between the piston and the plug? I just can't
> visualize anything else. If the head isn't to
> difficult to get to you might pull it and check for
> something like that. Is that a flathead or an OHV engine?
>
> Phil in TX
>
>
> On 11/29/2019 6:11 PM, craig.warner47346 at frontier.com
> wrote:
> I’ve got a question that’s kinda antique tractor
> related (depending on how you define antique.) I have
> a 1992 Ingersoll 6018 with an Onan 16hp motor. It
> usually starts and runs great. Last few weeks it’s
> been terrible to start but then runs fine. I pulled
> the plugs today and the gap was close to nothing in
> both of them. Opened the gap to.030 and it fired right
> up. Why would the plug gap close? I had issues with
> them this spring and set it at that point.
> Thanks,
> Craig
>
>
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