Well Poop, 1855 Engine Trouble
Posted December 27, 2013 - 06:39 PM
Posted December 27, 2013 - 10:37 PM
It's not an exhaust restriction, checked that. It has a new coil/wires/plugs. With it blowing the compression stroke back out the carb, it has to be an intake valve stuck open I would assume. BUT, I'm not a small eng. mech. Guess I will become one eventually owning an onan. I have tools, I used to work as an industrial mechanic, and spent 20 yrs as an aircraft tech. I know I can figure it out, the biggest problem I think is getting over the fear of a small eng. Never had one apart... first time for everyone I guess. Anny/All the hints/suggestions I can get before I actually tear into this eng is greatly appriciated.
Posted December 28, 2013 - 03:02 AM
Thanks, I will definately read through that.
- Alc said thank you
Posted December 28, 2013 - 07:33 AM
Posted December 28, 2013 - 07:57 AM
Posted December 28, 2013 - 08:37 AM
. I know I can figure it out, the biggest problem I think is getting over the fear of a small eng. Never had one apart... first time for everyone I guess. Anny/All the hints/suggestions I can get before I actually tear into this eng is greatly appriciated.
Well its already broke so what you got to loose. Take the tins off, take the heads off and have a look. I am sure it aint as bad as an aircraft and if you screw up aint nothing gonna fall out of the sky
- Alc said thank you
Posted March 20, 2014 - 03:17 PM
Well, an update to what is going on with 'er. Life got in the way, she sat outside all winter. I lowered myself and used a weed green with 3-point blower to clean the drive. Anywayz, aired up a couple tires that had gone flat, broker 'er loose from the snow/ice that built up on the tires/ground and pulled her up to the cement pad last night. This morning I moved her into the garage and cranked up the heater. Removed both spark plugs and did a compression test. Left side read 107, right side, a big fat 0. So I removed the right head fully expecting to see a valve seat loose. To my surprise, and very happilly so, there was a screw stuck betwixt the valve/seat. Took a few minutes and got the screw out, valve slapped shut. Turning the engine by had I saw it now moves normally. Examined the valve and seat, very minor scratches. I re-installed the head, torq'd 'er and did a compresion test on the right cylinder again. 105 is what she is now reading. I re-used the head gasket as it looked good. I will order some new gaskets for both sides before winter and get that done.
I'm happy to report she hums like a kitten after sitting this long. Now to find some ag tires and implements to work the garden shortly. I see lots of pin hitch plows/disks but no 3 point. Maybe I will have to find a 3-point to sleeve hitch adaptor.
Thanks to all of you for your guidance and help.
- MH81, coldone, Alc and 2 others have said thanks
Posted March 20, 2014 - 03:32 PM
Then you will find an air filter housing screw missing atop the carb, under the air filter element. Replace it, but use medium hold (blue) Loctite to keep them there.
Posted March 20, 2014 - 03:41 PM
Wow, you got lucky on that. Best case outcome for that situation.
Posted March 21, 2014 - 07:02 AM
That old Onan is hard to kill and nothing sounds better! On my 1855, I cut off the cat 1 pins and welded cat 0 pins on it and opened up the adjustment enough to use a cat 1 blade, discs, etc...
Posted March 21, 2014 - 07:33 AM
Glad to hear it wasn't a big problem !
Posted March 21, 2014 - 02:10 PM
Fun-fun-fun! Ole man winter is trying to stay alive. He dumped 3 inches of wet snow on us last night. So, for a short time I got to enjoy blowing snow. Then, all of a sudden, the blower starts shaking then quits working. I adjusted the chain tighter and it worked for a couple more minutes then sounded bad, like a machine gun firing off. The blower is still spinning, just not sounding good. The chain is not busted so I figure there is something wrong with one of the gears, either by the pto shaft or in the blower itself. Glad I enjoy working on old equipment. Like I needed more work this summer.... got an allis chalmers tractor to rebuild before I can get to this. Going to be a fun summer! Somewhere in there I want to do a trip or 2 on my moto bike. Got's a garden to plow/plant.... mmmm-boy we're gonna have fun!
Posted March 21, 2014 - 05:17 PM
Wonder if you lost a bearing?