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Not so much the money, I am wondering if those would fit. The L head muffler is tucked under the intake with a shield, then there is the hood. I will take a pic of the tractor. Maybe I can jumper 1" flex to the old muffler up front.

My neighbor sent me this, he said run it to the back, he modified his so he don't have to smell fumes. He also has a tailpipe 😂 https://www.amazon.com/Exhaust-Bracket-Portable-Silence-Diesels/dp/B09MRH5FSX/

Have a 2000 Murray that otherwise ran well. It threw a rod or two. Anyway thinking of an OHV 40series 22 or 20HP. https://www.smallenginewarehouse.com/40N877-0059 Would this be a good swap? Any Issues I would run into? I think it has auto choke so one less thing to worry. The mounting holes...

Have a 2000 Murray that otherwise ran well. It threw a rod or two. Anyway thinking of an OHV 40series 22 or 20HP. https://www.smallenginewarehouse.com/40N877-0059 Would this be a good swap? Any Issues I would run into? I think it has auto choke so one less thing to worry. The mounting holes...

I want to replace a 46 series opposed with this: https://www.smallenginewarehouse.com/40N877-0059 will it likely bolt up? I guess the muffler may be an issue but the shafts seem quite close in size.

I'll also add I fixed the trans on this tractor. It has a Techemseh hydro trans. A bolt got loose in there.

I have some numbers off it: 460707-2278E1-9910225A Put in service 10/11/2000 It is a 46 series, which is a large engine.

There was definitely oil around the engine, on the frame. I don't see any cracks on the block. Some on the pulley too. Guess I have to pull it off the tractor and start digging in. I estimate that amount of oil should be enough to push it into the low crosshatch area, which probably isn't...

How do you determine root cause? I suspect the impact driver, but many said no way. Also, if the oil was toward the low mark, I could believe that.

Yes, I plan on at least tearing it down. Just looked in the inspection hole, there could be more surprises. When I do I'll probably post pics. I pulled the heads a few years ago and except for some cleanup, it all looked good.

Engine is a 20HP year ~2000, Opposed Twin. About 7-800hrs. Splash lube. Always smoked on startup. It was ok until now except for issues with starter gears and the ignition coil. Decent maintenance, but the oil may have been left a season, but under the hours for a change. Not much use...