How to Diagnose Poor Running Briggs and Stratton Intek Twin Cylinder Engine 

Thank you for watching and the kind comment.

Hi Thomas, thanks and thank you for watching and commenting. Please give this video a like to help the channel. it would be greatly appreciated.

I will in the future but this was a case of not repairing and so I did not get a chance to perform the repair. It will be a good video when it comes up.

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Imam glad it was helpful! Thank you for watching:)

Thank you for understanding but to many negative comments made me do that. Thank you for supporting the channel!

I’m glad it was helpful! Thank you for the kind comment

Took the words out of my mouth.

If your intake rods are bent, replace them. I do not know the history of your engine and cannot say either way.

Have you had mice issues? If no, It sounds like you may have leaking intake gaskets (there have been issues with the gaskets leaking). OR you may have a carburetor issue (it may need to be cleaned). I would suggest new intake gaskets , if that doesn’t work then rebuild carburetor. That being said, It is very hard to try and help when I cannot be there to hear it and look into what it may be so this is just a guess.

Have u took the valve covers off to see if any of ur push rods are bent?

I cannot answer that correctly as I never ran a twin Briggs that way. I would assume it would interfere with airflow/exhaust. I guess try it and time will tell.

If it was a single cylinder engine and this happened. The engine would not run. You may have other issues and I would need to hear it up close to give you pointers. If it’s running and cutting grass ok? I would just make a point of keeping the oil checked and at the correct level and change oil at least once a season.

@@JohnsonsSmallEngines Yep, runs and cuts great. It is 18 years old and we cut 3 acres with it every week. I did replace the governor a few years ago, but, other than that; it's been a good mower. Thanks for your help!

Hi Mike Yes same as valve seat.

@@JohnsonsSmallEngines Thanks Brad!

Can't say what is going on without being in front of the engine to diagnose but I would say you most likely you have a cylinder that is not working as it should.

Without seeing and hearing how your engine sounds it is almost impossible to diagnose. How many hours is on it? Knowing that if you choke it more and its ok, it sounds like fuel and you are correct to assume that as I am also thinking that. If the side that is not working is possible sucking air around the intake gasket? If you have a plastic intake manifold? I do know Briggs had issues with the plastic intakes would warp where they bolt to the head assembles and they came out with a very nice gasket to help. The part is#594209. I think it comes as a set of two. Popping and missing can also be valves and I know you said that you adjusted the valves. Did you check compression? I would also try rebuilding the carburetor again and if you can find a ultrasonic cleaner to put in in for 35 minutes that will help. Check to make sure you do not have any open or wires on the side that is popping that may be grounding the coil or any wires. I would also put two inline ignition testers on both spark plugs to see if when you throttle up you may sporadically loose the coil. Though normally that is not the case.

I have peened them before and it will work but may not last forever . If done properly, it should last for a long time.

I'd give it a go. What could happen... It'll do it again.? Not a biggie. I would also try roughening up the outside of the guide and if you have a quality hi temp epoxy, put that on as well. Should be a tight fit and then "stake" it around the edge.

Check your spark when it gets hot?? Coil may be failing. The question is how did the first push rod bend??. If your guide is ok, you may have a valve seat walking. Push rods don’t just bend. Check rocker stud to make sure it’s tight.

@@JohnsonsSmallEngines Thank you so much for your reply. I'll look into that.

You called it, I'm not getting spark. I assumed it had/has something to do with the fact that I took the head off and put in a new pushrod. The valve guides look fine. I had not checked the seats. The intake rod has not re-bent yet, but does that mean it's going to again sometime soon?

I’m glad you found the issue. I cannot answer your question without seeing the engine. Repair the ignition issue and go from there.

Impossible to tell you what your clicking sound is without actually being there in front of your machine. If the engine is running OK and you are just now hearing the noise? It may be a simple valve adjustment. That is where I would start. I do not have a video on adjusting the valves on the twin cylinder but I’m sure somebody has one out there to be able to help adjust your valves.

@JohnsonsSmallEngines thanks...I know how to adjust valves...I'm actually trying to help a neighbor...I never heard this clicking on a mower before....I had valve cover off and was turning flywheel by hand observing the movement of the valves and I hear all kinds of clicking...almost like something is going on with the crank gear or cam gears

:)

Most of the time you when you get oil in the air filter, it will be due to; you have too much oil in the engine, check the engine oil and if it is to high lower it. I also have seen oil in the air filter if you have a blown head gasket.

@@JohnsonsSmallEngines thanks for the reply. Picked up the mower for free. Was basically dripping oil pushing it on to the trailer. Check dip stick, was barely registering. Still spins, not seized. Bought a gasket for it. May just change the head gaskets to while i have the motor out.

The person who owned it before you may have overfilled it and blew the oil pan gasket in the process. Hence now there is no oil in the engine. I have also found loose oil filters that will seep oil and it looks like the oil pan gasket is leaking so check oil filter first. I would also suggest before you start taking the engine apart to use a degreaser and clean it first. Put oil back in and confirm where the oil is coming from.

@@JohnsonsSmallEngines lady talked about how it would get too hot and the PTO wouldn’t go up…. When I took the cover off the engine. The top part of the heads were covered in oily grass too. Everywhere was…. Getting more cans of degreaser and doing the tops of head and carburetor today cleaned up.

That’s not good. Hmmm maybe top crank seal leaking too. Just keep degreasing it to find out where it is coming from. Let me know in the future how you make out!

Yep, it has blown up. Broken connecting rods. The cam that at moves the valves works off of a gear that works with the gear on the crankshaft. The valves will still move when pistons do not.

@@JohnsonsSmallEngines wow, both connecting rods would snap? What would make it do that? Would it be repairable? Man, I bet this thing would have made a crazy bang when it went …

Even one better, the customer said exactly that and gave me the machine. I put the valve guide back into position, peened the valve guide and it runs great. I use it as a loaner when I have customers machines in for repairs. It now has over 1300 hrs :)

@@JohnsonsSmallEngines that’s awesome! Well done! 👍👍👏🏻👏🏻👏🏻