Subaru Power makes some of the best general purpose small engines. This Subaru might be the exception. The connecting rod broke and it punched a hole in the block. Lets break it down and see what went wrong.
Engine Model: EX27, EX30
Subaru Power: https://subarupower.com/products/engines/ex27-overhead-cam-engine/
Yamaha Motor Corp., USA’s Outdoor Power Equipment division has announced the acquisition of Subaru Industrial Power Products. The acquisition is a result of an agreement between parent companies Yamaha Motor Co., Ltd., and Fuji Heavy Industries Ltd., both of Japan, and is expected to be completed by Oct. 1, 2017. Fuji Heavy Industries is ceasing the production and sale of multi-purpose engines, etc. at the end of September 2017.
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Blown Connecting Rod, Broken Governor, Con Rod, Connecting Rod, EX27, EX30, Generator, HU5000, Hertz, How To, How-To, Load Test, Low Oil, Small Engine, Subaru Power, Subaru, Subarupower, Troubleshooting
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James Condon is better if change directly the engine self
First time I've watched a small Subaru engine tear down. Interesting, I noticed the roller bearings, and a metal timing chain I'd think would be much better than a belt for overhead cams on small engines as it wouldn't deteriorate while sitting for years. .
Sorry James Condon but this Subaru engine is blew up also the carter self so the engine is no more useable
So I'm sitting here watching this video with a cup of coffee in my hand. Started to yell at you for forgetting that last bolt in the crank case cover as you were prying on it. Chuckled when you noticed it. Then I really had to laugh when you were holding the cover and pounding on the crank to get it out. I said to myself "what could possibly go wrong?" But, you didn't do too bad. If it were me, it would have fallen and smashed into my foot. All in all, a very informative and entertaining video. Thanks!
Plastic parts ruin good engines. I had a similar failure on a Yamaha cloned engine when the plastic camshaft gear cracked while the engine was running at full load.
SOMEONE WAS OVER REVVING THE ENGINE GOVERNORS DO NOT GENERALLY FAIL
I had one that over heated and took the temper out of the rings, it was smoking very bad. Replaced the rings and ran like a champ on propane. But after market carbs suck for this engine.
Wish I had the carburetor off of it.
I just rebuilt one of these that the rings were seized in the piston grooves and was producing a ton of blow by. You are right about it being an expensive engine to get parts for. The rings alone were a little over $50, but after the new rings were installed it ran excellent.
You could rebuild that and have the block welded for probably $50, but the connecting rod is over a $100. All said a done, you’d be looking at about $200 to rebuild it. IMO, not worth it. But it’s a great parts engine!!
Thanks Jim for yet another fab video……as you say, such a shame they went with some plastic parts inside, talk about a halfpenny's worth of tar that sank the ship. That top end is just beautiful……penny pinching point of failure…..
Enjoyable expiration of root cause .
First I didn't know that Subaru made small engines I thought they only made boxer engines and second I'm guessing rod bearing or crank bearing
The Subaru and Robin small engines, are they one in the same? I have a small 3250 Coleman Powermate with a Robin on it.
I'm pretty sure your assessment is on spot.
They ruined a beautiful engine by using a plastic governor instead of metal.
I wonder if this one was run for a long period on a slope, causing the oil to pool one side of the cranc case, and starving the bottom end of engine of oil causing the conecting rod / governor failure?
Even The Best engine is prone to fail if no maintenance is done to them or poor quality metal is used to make the parts for it that is My thoughts
Running it out of oil would be my guess