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Maytag Engine Collectibles Maytag engines, washing machines, mowers and other engine driven tools for the farm.

Maytag Engine Collectibles

Maytag Model #31


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  #1  
Old 05-02-2018, 08:48:51 AM
TommyC TommyC is offline
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Default Maytag Model #31

Would start on about the 2-3 try about 4 years ago. Drained all the gas and it sat in storage for 4 years.
Yesterday I cleaned the spark plug (gapped at .025), cleaned and checked the points gap at .020 added 16:1 gas. No fire, nothing. Tried it with a big electric drill and still nothing. Carb is clean, as is the filter on the pick-up tube.
Spark is not the best, but it started easily and ran perfect with that same spark 4 years ago. Gas is being pulled into the bottom of the block, but does not show up on the spark plug or front of the piston. Tried starting fluid into the carb and then into the spark plug hole. Nothing either way.
Compression is about 30#, which I don"t think is enough to pull the gas to the plug. Removed the cylinder and intake and exhaust passages are clean. Ring edges are sharp and rings are loose and compress into the clean groves on the piston.
Ran perfect 4 years ago and now will not evan pop, let alone run.. Need some assistance on what to do next.
Thanks, Tom/Idaho
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Old 05-02-2018, 09:44:45 AM
Pat Barrett Pat Barrett is offline
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Default Re: #31 Maytag

Well, try a different plug, first. You said you had the jug off. Did you get the intake port of the gasket lined back up with the cylinder?
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Old 05-03-2018, 07:52:13 PM
TommyC TommyC is offline
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Default Re: #31 Maytag

New plug makes no difference. The gasket stayed with the block when I checked the rings, so yes it's as it should be.
New gasket on carb does not help. With my thumb over the carb intake there is virtually no suction, which would explain why there is no gas to the spark plug. How can that be when it started very easy and ran perfect just 4 years ago. No changes whatsoever. Crankshaft is secure with no lateral movement.
Any suggestions are greatly appreciated.
I could replace the rings, but I don't see how they could be damaged just from setting.
They were new just 4 years ago and the cylinder bore does not show any damage.
Thanks, Tom/Idaho
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Old 05-03-2018, 08:42:24 PM
Pat Barrett Pat Barrett is offline
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Default Re: #31 Maytag

Tommy, I am only arm chairing your problem. First, I'd check for any dirt (Mud) daubers having built a nest in the carb. Go back over your carb again, especially the check valve. Having set up, you may have some corroded electrical connections. And make sure, the stator plate has a clean connection to the main bearing. You said you cleaned the points. Did you remove the stationary points contact? If so, and it's not pinned to the stator plate, that may be out of adjustment.

---------- Post added at 07:42:24 PM ---------- Previous post was at 07:37:08 PM ----------

And make sure you didn't stuff a piece of paper or paper towell in the intake to keep critters out, when you stored it.
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Old 05-03-2018, 09:15:33 PM
TommyC TommyC is offline
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Default Re: #31 Maytag

And make sure, the stator plate has a clean connection to the main bearing. You said you cleaned the points. Did you remove the stationary points contact? If so, and it's not pinned to the stator plate, that may be out of adjustment.

Stator plate has not been removed.
Points were not removed.
I have disassembled the carb several times and checked all passages for obstructions.
I will do it again tomorrow.
If the rings are good and the cylinder bore is good and gas flows thru the carb, what else could prevent it from sucking gas to the plug? Crank bushings are good and tight.
Air cleaner was covering the carb intake.
I ran before it sat for 4 years and now with no changes....It won't.
I really do appreciate you taking time to try and help me.
Tom/Idaho
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Old 05-04-2018, 12:15:27 AM
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Motormowers Motormowers is offline
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Default Re: #31 Maytag

30 psi is extremely low for any engine to run. Are the rings stuck to the piston? Usually on a two cycle when youre getting spark and fuel and compression and it wont run its usually a vacuum leak. What do those use for crank seals?
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Old 05-04-2018, 03:00:00 PM
Andrew Mackey Andrew Mackey is offline
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Exclamation Re: #31 Maytag

There are no crank seals. The engine depends on a tight fit between the crank and block bearings (1.5 to 2 thousandths). What kind of oil are you using? most modern 2 stroke lubricants are too thin to maintain a seal between the crank and bearings. SAE 30 non-detergent or TCW-3 OIL only. No synthetics or 1 ratio oils in these low speed engines! Try spraying some SAE 30 oil from a squirt can on the bearings, and into the intake, and see what happens. With the engine setting for so long, the rings may have become gummed and probably are dry as well. Give the cylinder a couple shots of oil too, and rotate the engine with the spark plug out to spread the oil. Re-check compression. Does the engine bounce back against the compression stroke, as it comes to a stop, or does it just mush to a stop? if it does not bounce back several times, ring to cylinder seal is an issue. This is not a perfect test, but it will give an idea on what is going on with compression.
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Old 05-04-2018, 07:00:16 PM
TommyC TommyC is offline
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Default Re: #31 Maytag

Drained the two stroke oil/gas mix and will feed it to my 'I'll eat anything Ford tractor".
Mixed SAE#30 ND oil 16:1. Put straight 30# oil in the intake, cylinder and as much as I could on the crank bearing. Brought the compression up to 45#, but still no fire.

Does the engine bounce back against the compression stroke, as it comes to a stop. Yes.
When I took the cylinder off yesterday I could see that the rings are not gummed up.
Spark is not the greatest, but (I'm pretty sure) it ran 4 years ago with this same amount of spark. I did re-check the gap and cleaned the points.
I also went thru the carb again. Clean as can be. Gasket and lead washers are good.
Crank appears to be good and tight in the bearings. Maybe new rings are the answer.
Once again, thank all who are trying to help.
Tom/Idaho
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Old 05-04-2018, 07:36:17 PM
Pat Barrett Pat Barrett is offline
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Default Re: #31 Maytag

Keep us poste on your workings. I had one a friend brought to me and he'd given up on it. I went and took a known working carb, stator plate and flywheel off and swapped everything around time and time again, with no luck. I wound up getting another cylinder and putting on and Poof. It ran.
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Old 05-07-2018, 03:17:19 PM
Kevin Weis Kevin Weis is offline
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Default Re: #31 Maytag

Its not common on 92's, but the coil could have weakened enough to not spark now. Especially of it was exposed to moister for some time. The carb (including the pick up tube/check valve) should be pulled apart entirely, cleaned, and adjusted properly. I'm thinking there is some blockage in an airway or has been said, pick up tube or something. Sounds like you cleaned the intake passages in cylinder. My thoughts, Kevin.
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