Whoops, I meant Onan.
Dave
On 6/5/2019 9:55 AM, Todd Zuercher wrote:
If this is turning into a small engine clinic, I have an old (late '70s vintage) Onan
NHCV engine that is giving me huge problems. The "V" in NHCV means that this
engine sucks, quite literally in more ways than one. It is a vacuum cooled engine, where
the flywheel sucks the air over the engine to cool it instead of blowing. Long story
short, it spit out one of its exhaust valve seats, I'm guessing from inadequate cooling.
I've tried to peen the seat back in, but I still have to lap the valve and adjust the
valve lash, before trying to start it.
I'd love to repower it with something else, but unfortunately in this
application (a skid loader) it isn't very practical without major modification
to convert it to using a conventional air cooled engine. What would really be
nice would be one of those little water cooled Kawasaki V-twins, but the $2k
price tag is a little more than I can stomach right now. (for the 3 or 4 times
a year I might use the thing.)
Todd Zuercher
P. Graham Dunn Inc.
630 Henry Street
Dalton, Ohio 44618
Phone: (330)828-2105ext. 2031
-----Original Message-----
From: Chris Albertson <[email protected]>
Sent: Tuesday, June 04, 2019 10:09 PM
To: Enhanced Machine Controller (EMC) <[email protected]>
Subject: Re: [Emc-users] Wanted, small engine whiz
I had the same thing happen to a car a long time ago, Back when I worked
on them myself. It ran on five cylinders and the 6th one had a tiny hole
in it and it acted like a pump to pressurize the crankcase. That is the
only way to explain oil shooting out the crankcase: Somehow cylinder
compression is getting in around the pistons. You will be able to see it
with the head removed. Yes, it could be a head gasket if compression gets into
an oil passage that leads back to the crankcase.
As for garden tools. All my gas powered stuff is gone. I'm 100% electric. It
is all battery powered. Zero maintenance and they always work. My next car
will be electric too.
On Tue, Jun 4, 2019 at 3:17 PM Gene Heskett <[email protected]> wrote:
Greetings all;
A month ago my old JD rider was running clean and did the front yard
nicely, then I had a water leak and used it to stretch out a coil of
3/4" plastic to reach from the meter into the house. Has been sitting
there in the open gate to the back yard, gas shut off, tank nearly full.
So yesterday I tried to start it, but everytime I get it to a throttle
where it will mow, 3 seconds later a huge cloud of oil smoke and it
dies, repeat till the battery is wiped out.
Get up this morning, check the oil & its 1/2" overfull??? Put the
medium sized automatic charger on it for about 4 hours while I go get
a few things from the grocery store and stop at Fred's place & make a
deal on a Craftsman about 10 years old, a 46" with a hydraulic tranny
and a 26 hp v-twin to spin it, comes with a new deck and some wheel
weights but it will take Fred 3 days or so to get it ready to load.
His grandboy help is fishing in Canada. $850.
Come back, pull the carb and clean it, put it back totether, fires
right at about a 600 rev idle. Left the cleaner off because its oil soaked.???
Let it idle while I corral tools, come back and going to cut about 1/4
of the back yard. Wind it up to about 2500 & start to engage the deck.
geiser of oil shoots about 4 feet up in the air out of the crankcase
vent hose.
Also looks like small leak in head gasket below the exhaust valve. Par
for the course for a Briggs & this one says 11 hp.
So it looks like I deal for the bigger craftsman, The $16 question is
whats most likely wrong with the engine? This,I'm guessing is more
than a head gasket. But is it worth tearing down to see?
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>
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