D130 will not start, tried every bit of advice already- Help needed -Hero opportunity

tcartwri · Sep 7, 2015

You likely have \ had a stuck valve and now a broken pushrod. That's what the backfire was from. Pull the plugs and spin the motor over. You should normally get a nice strong puff of air from each hole. The one that doesn't puff is the cylinder with the problem.

ZaqAttack · Sep 7, 2015

Well day is done and thanks for the replies I will try to answer every inquiry
- I believe it is resolved that there should be no issues with safety switches as it is cranking...
- I have downloaded all available manuals and this was the parts and operating manuals
- I have checked for compression - removal of plugs, and there is lots of pressure coming from both cylinders via thumb test
- the plugs I checked by removing them and then hooking them up and grounding to the block and starting - can see the spark arc and sure seems appropriate
- I have sprayed starter fluid and no go
- new plugs have a gas odor - nothing huge, but my head has a lot of carb cleaner from my backup mower rehabilitation project
- as noted before the solenoid works and the carb bowl is full after two separate checks

I am thinking timing - or perhaps fuel (but that starter fluid should have fired her over ??)

I was not able to get the flywheel off as of yet, have the remover kit but did not find a socket big enough before the stores closed - and I am curious as to how Coyote machine checks the timing - You don't need to pull the flywheel to check timing.

If you can let me know how, this would help as pulling the flywheel is now delayed...

I did see in another previous thread in a different forum about this engine ( B&S model/type 407777/0285 ) having a service bulletin for value adjusting - and the contributor was offering it up by email - so I have asked him for that ,,, even though I am getting puffs, maybe I do have a value problem - maybe I need to go buy a compression gauge kit ?

thanks for everyone's help so far...

GerryE · Sep 7, 2015

Pull the valve covers and look over the valves and pushrods. I am willing to be you have a bent push rod from a stuck valve. The stuck valves are usually caused by poor fuel or excessive cylinder head temp from being plugged with grass.

Raspy · Sep 7, 2015

GerryE said:
Pull the valve covers and look over the valves and pushrods. I am willing to be you have a bent push rod from a stuck valve. The stuck valves are usually caused by poor fuel or excessive cylinder head temp from being plugged with grass.

Zaq,

It's a two cylinder engine and has compression on both cylinders. That pretty much eliminates a bent push rod.

It has spark and gas, or starting fluid, and won't start.

Not much left after spark, compression and fuel, so it seems like timing, but that is flywheel controlled, so maybe its a bad module or coil, I don't know what those look like on that engine, but maybe it only has enough fire to spark when the plug is out of the engine.

Plugs can fail and short to ground from metal on the electrode. Happens a lot on dirt bikes, but they won't both fail at the exact same time.

I'm thinking it's in the ignition system. Coil or module.

One more thought. Some of those engines shut off by closing the throttle all the way, beyond idle to zero. Make sure the throttle is opening up when you do the starting fluid test. Choke open, throttle open, cranking and spry a heavy dose of fluid. Do that as a final test before tearing into it. Then start looking at ignition.

meos1 · Sep 8, 2015

Its probably the module or the trigger.....Flywheel have a new shiny place on it?

tcartwri · Sep 8, 2015

Raspy said:
Zaq,

It's a two cylinder engine and has compression on both cylinders. That pretty much eliminates a bent push rod.

If it's the exhaust valve that has broken \ bent a pushrod, you will still get a pulse of air from the spark plug hole.

davesl708 · Sep 8, 2015

A compression tester is the best way to determine if your loosing compression. The flywheel has a key that locks it to the shaft. If it is partially sheared it will throw off the timing. I have see half sheared keys on small engines. They usually have a kick back when starting.

With only 60 hours on it in three years a sticky valve could be the source. A compression tester will determine that.

Raspy · Sep 8, 2015

tcartwri said:
If it's the exhaust valve that has broken \ bent a pushrod, you will still get a pulse of air from the spark plug hole.

Yes, but it would fire on the other cylinder and we don't know how much compression it has. Gauge test or thumb test.

JRobyn · Sep 8, 2015

Any chance that the muffler outlet is plugged with a muddy clump of grass or dirt-dauber nests? I had a weed trimmer that was a no-start due to this once.

- Jay