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So I looked at a picture of the brand new carburetor and there is a hole on the carburetor with threads and there's nothing in it so maybe it came that way. Maybe nothing is missing except the choke lever no longer has any spring to it even though there's a spring

I can't upload the photo but there's a screw apparently I see and. So it's a brand new carburetor and I see threads looking down near the choke plate area on top and there's some sort of that might go in there. A screw goes in there I think and maybe that explains the extra air coming in

So it says four-cycle SAE 30 oil

So it says four-cycle SAE 30 oil. It's over where all the lawn mower stuff is at this big box store. Let's say I'm pretty sure it's the right thing

So I just went back outside and I want to be very specific about what happened. So I started the engine up which is no problem. I then pushed the throttle lever into the choke position and it started to struggle a bit which is what you had explained. So there's a fine line between the thing...

Forget about my square feet measurements. Let's say 220 ft long by 100 ft wide, whatever that equals. And that was like 15 to 20 minutes worth of cutting. And as I recall the temperatures were maybe 500° maybe 600 on the exhaust pipe when I got done

I just saw your response. Thank you. I will go check it out and report back here especially with the oil. But it's strange because I was able to cut maybe 1,200 square feet like 4 days ago. The blade wasn't really correct in various components but that took like maybe 20 minutes and everything...

So today July 30th 2024 I just ran it for about 5 minutes. I was actually cutting grass it seem like the governor was kicking in more than normal. I shut it down. I took the temperature with a thermal gun. The thermal gun can't register the temperature because it's too hot and the video above to...

I'm not sure about what you're saying but the box came today. It says Briggs& Stratton on it and it looks like it is identical. I threw the box away but it seems to me to be the same exact setup.

Well right now. Hopefully there are no issues. This has been 7 weeks of constant problems. I'm sure a small engine mechanic would have that solved and maybe the first 7 hours but the cooling fan or fins. The plastic fins plus couple other parts just came. So I'm going to put those on. The only...

And the only thing additional on this topic. Up until a couple months ago I had a digital tachometer mounted on the dashboard and where the blades fully engaged. This thing maintained a steady RPMs of around 3,500.

If anyone has ever done something similar, that's the question?

One thing I can say about high temperatures at the exhaust pipe. I was looking for thermal sensors for high heat and basically end up with a bunch of grilling tools but the idea was to wrap something around the exhaust pipe so I could see exactly what was going on and have the readout on the...

Don't you just love it when some people say something that makes so much sense other people jump. Jim

I am going to listen to what you said. There's no doubt about it so I will order that kit that comes with the plastic fins and that cup made out of metal and maybe one other thing

Thank you very much for your Stern warning. I was just going to run it with broken partially broken fins. I'm hoping right now since I don't even have the belt for the mower deck, but even running it for 5 or 10 minutes isn't going to do significant harm to it. I did run it maybe half hour ago...

So while all this was going on I was looking for something that I could use and I bought a used twin v. It's a yard machine. Overall I would say it's a very heavy very well-made machine. Hydrostatic 42-in 17 and 1/2 horsepower but it is a twin v and I didn't even want to try and fix that by...

Tonight was the first time I was able to drive the riding mower around the yard without any adjustment on the carburetor so I took a ride out of the box. It runs pretty good from having a tachometer on the machine, but not right now. I'm guessing it's probably running like 2800 RPMs without any...

I put everything back and I was just wondering about the temperatures so I have a thermal gun and I started the mower up. It starts up pretty good. No more hunting and searching so thanks to a brand new carburetor that issue seems to be resolved, but I'm still concerned about what happened 6...

Well after many attempts right now it seems to be running okay. The temperatures are still kind of high. A brand new carburetor from Amazon out of the box needed. No adjustments. It's the other one is probably garbage and I wouldn't know it because of so many things going wrong. But since I...

Turn the governor shaft clockwise they say

July 21st about 1:00 p.m. I made sure the governor was set correctly so throttle on high throttle turn the governor shaft to the left. Don't force it. Tighten it up. Made sure the intake manifold gasket was properly installed. That's tight. Brand new fuel line. Brand new fuel filter. Brand new...

Okay, thanks for this this explanation. I appreciate it. I did find when I put my hand over the plastic intake that's part of the carburetor. It definitely affects the hunting and surging and smooths it out. Closing the choke by hand on that butterfly has the same effect. It's just when you're...

Just did another test with a commercial fan blowing air away from the cylinder head and a thermal gun registered. OH that stands for overheating of the thermal gun so the temperature was up around 900° f. I have trouble believing this is all related to a carburetor, but I'm not ruining out that...

The only thing I will add is sometimes when I run it for a few minutes the temperature is under say 600° f and sometimes I run it and the temperature is up near 800° f and I can't figure out why that's going on? I use an external commercial fan for cooling because I have that engine housing off...

So right now I'm able to tame the hunting and surging by doing nothing more than adjusting by holding on to the black lever on the carburetor which controls the choke. But basically when you block off air, there's no more hunting and surging pretty much.

So I just watched the video on the actual filter and this guy claims he spoke to numerous Briggs and Stratton engineers. He said it doesn't matter except if you've been collecting dirt on one side in the filter and you reverse it because you're doing another install. All that dirt could end up...

Okay for that test. I was able to smooth it out a bit, but I want to repeat that test several times primarily to get more gas, get a better fuel line and make sure I have the fuel filter pointing in the right direction. But like I said, it seems as if when I control the throttle linkage with my...

I've gone down to some very basic troubleshooting. I connected a gas tank to a short hose that goes to the carburetor. I elevated the tank just to make sure about gravity. In any case, it's still hunts and surges would someone who actually works with engines sign off on this and say there's...

The good news in this video is with an additional fan. The temperature is under 400° f. That's fantastic! The other good news is the problem. It was exhibiting this morning is the same exact problem right now. It's not some random unknown problem. So that's good news but is still hunting and...

This is from July 18th, 8:30 a.m. so it starts right up and it still goes into the hunting and surging. Maybe there is a vacuum leak. I've ordered two new head gaskets. The good thing is I don't see any oil around the chassis area. I was concerned about oil coming out of the engine. The hunting...

This is the latest video. It actually almost seems like it's running okay. However, the temperature on the exhaust pipe is about 830° f and I only run it for a couple minutes now. I can't imagine just because the engine housing is missing that accounts for say 300° f. I think there's still...

In this video I am moving the throttle from low speed to high speed back and forth and I'm not sure if the governor lever is supposed to be moving at all. The engine's not running. Jim

I don't run it for very long and I don't plan on just leaving the engine running high RPMs just a test if it's still hunting and surging I don't think it's hunting and searching. I just think it's running full throttle and I got to get it so it's running. Say 1800 RPMs

I can't say if it sounds good or bad but it runs. The problem is it runs at high speed so I have to control the RPMs with my finger. Maybe it's strictly a governor adjustment. Maybe not but it just wants to run. Maybe 4,000 RPMs whatever. I'm hoping the only thing is the governor adjustment...

So I got it back to hunting and surging and the throttle linkage is going back and forth wild so I had to put my finger to try and keep the same idle speed. I got to do more testing. Get out the thermal gun. See what's going on on the exhaust side for temperature

Spraying carburetor cleaner is the only way to keep it running

Just so there's no confusion for a very long time. It was starting up instantly and then all kinds of help broke loose when the last 4 days it struggled to start but then I found a bent push rod. Now all that's been cleaned up. So now it's starting up instantly and it's shutting down. That's a...

Forest, here's where that 19.5 Briggs& Stratton OHV engine stands so I put a brand new push rod. I happen to have an aluminum one and that's exactly what I needed and it was brand new so that's in place. The valve caps are in place. The intake is at 4000. The exhaust is at 7,000 brand new spark...

Omg I found this. I'm not saying another word

So with both valve caps basically the engine is destroyed. So absolutely time for the shop and not mine

And this is for the guy who thinks I'm messing with people. This is what happens. I'm not trying to do this. I want a lawn mower that works. That's all I want

What? I don't know is if you're missing one of those valve capsAnd and start the engine what will happen?

Forest it absolutely is in this little container that I saved. It has a bunch of flywheel, keys and all that other stuff. If you're betting on a fell into the engine, you're betting on the fact that I have 100% concentration and that's a bad bet so I have no idea. I'm just telling you what I...

So I don't know the significance of this but the Valve cap from the exhaust valve is missing. So I have to put another extra one on that I have and then when it doesn't start then I agree with you 100%. But I can't leave it like it is. The valve cap is looks like a little hockey puck made out of...

Actually the more I think of it. I want to walk back this this comment and here's why it might have been like a week ago I had the engine housing off. The engine started up right away and there was no hunting and surging. Maybe only a very little bit and I thought that the solution was something...

But having said all that maybe 4 weeks ago, some folks and I can't remember who they are said it's probably the camshaft. Maybe it's spent. Maybe there's something wrong with it, so if it was them they probably would have just proceeded to take take the engine apart but I didn't know if they're...

Forest, keep in mind I spent maybe 5 weeks trying to figure out. Is it something broken inside or is there something that's not adjusted properly? You know had I known 5 weeks ago, I want to bother messing with it on the outside and I don't have a skills to hear things that are going on inside...