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post #1 of 35 Old 10-16-2019, 04:33 PM Thread Starter
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Is this blown engine rebuildable?

Hello, I just picked up what I thought was a really good deal from Craigslist. It’s a Craftsman Professional PGT9000 with a Briggs 28hp engine and a 54” deck. I got it for $200. The add said the engine didn’t run, but when I got to the guys house, he said he replaced a fuse and got it to start and run. I thought I was getting a heck of a deal! I drove it on to my trailer and brought it home. When I got home, I started it up and began backing it off my trailer, then the engine died with a bang. I tried to start it but no luck. I pushed it over to the garage and pulled the spark plugs and found that neither piston was moving. So I removed the engine and opened it up. Both connecting rods were blown apart! I started taking things apart when I found a big gash in the bottom of one of the cylinders and a small one in the other. The cam shaft is also slightly bent. Is this engine repairable, or should it trash it and try to find a new engine?

P.S. I’m not mad at the guy who sold it to me. He said he got it from a guy who owed him money and didn’t know anything about it. I also bought it knowing the engine could be blown.
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post #2 of 35 Old 10-16-2019, 04:53 PM
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Re: Is this blown engine rebuildable?

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It wasn't blown when you got it or else it wouldn't have started/ran. Oil?

I think if you priced parts you may decide on a used engine. Gouges in the cylinder wall??? What's the inside look like and are you willing to risk it?
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post #3 of 35 Old 10-16-2019, 05:04 PM Thread Starter
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The cylinder walls look very good to my untrained eye. The bottom of the #1 cylinder has a chunk taken out of it, along with a piece of the cylinder casing. Would it be possible to replace the cylinder sleeve? And would that hold up with the chunk off the casing missing?
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post #4 of 35 Old 10-16-2019, 05:07 PM Thread Starter
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Sorry, I forgot to add the model number. It’s a 917.289740.
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post #5 of 35 Old 10-16-2019, 05:18 PM
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Re: Is this blown engine rebuildable?

Looks like a chunk of the lower cylinder wall is gone, so that greatly reduces the likelihood of it being good (it may still work ok).
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post #6 of 35 Old 10-16-2019, 05:26 PM
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Re: Is this blown engine rebuildable?

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Originally Posted by AdamCanFly View Post
Sorry, I forgot to add the model number. Its a 917.289740.
Sears doesn't list WHICH Briggs (or engine)
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post #7 of 35 Old 10-16-2019, 05:31 PM Thread Starter
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Quote:
Originally Posted by AdamCanFly View Post
Sorry, I forgot to add the model number. It’s a 917.289740.
Sears doesn't list WHICH Briggs (or engine)
Looks like it’s 49M777-1296-G1.
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post #8 of 35 Old 10-16-2019, 05:51 PM Thread Starter
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I pushed the piston all the way to the bottom of the cylinder and traced the missing area. I’m starting to think that it will still work. I will need new connecting rods, piston rings and cam shaft. I imagine I will also need some gaskets when putting it back together. I’ve never done this, so hopefully I don’t screw it up!
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post #9 of 35 Old 10-16-2019, 06:26 PM
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Re: Is this blown engine rebuildable?

If you can get the parts cheap enough then there's not much to lose by giving it a shot, and it'll be good experience.

OTOH if a good engine appeared at a reasonable price you could swap it in, then play with the carcass of the old one at your leisure.

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post #10 of 35 Old 10-16-2019, 06:34 PM Thread Starter
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If you can get the parts cheap enough then there's not much to lose by giving it a shot, and it'll be good experience.

OTOH if a good engine appeared at a reasonable price you could swap it in, then play with the carcass of the old one at your leisure.
Looks like Ebay is a good place to find engine parts. I’m going to get on the computer tonight and see if I can get All of the parts ordered.
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post #11 of 35 Old 10-16-2019, 06:49 PM
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Re: Is this blown engine rebuildable?

Just me, but since you have no experience with rebuilding an engine, I would look for a decent running used on. A lot of damage in that one and there may be more than you are seeing.
If you want to rebuild an engine and get some experience, start with something that is just worn out and not damaged.....

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post #12 of 35 Old 10-16-2019, 07:58 PM
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Re: Is this blown engine rebuildable?

That engine was probably running on one cylinder when pieces of the already-broken piston made contact with the good one as you backed it off the trailer.

Best and cheapest route is to look for another Vtwin with similar electrical connections. Horsepower rating won't matter much; 16-28 will spin the deck and run the hydro no problem.
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post #13 of 35 Old 10-16-2019, 08:55 PM Thread Starter
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That engine was probably running on one cylinder when pieces of the already-broken piston made contact with the good one as you backed it off the trailer.

Best and cheapest route is to look for another Vtwin with similar electrical connections. Horsepower rating won't matter much; 16-28 will spin the deck and run the hydro no problem.
I was thinking the same thing. It wasn’t running smooth while it was running. Oh well.

I think I will start looking for a good used engine.
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post #14 of 35 Old 10-16-2019, 09:26 PM
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Re: Is this blown engine rebuildable?

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Originally Posted by poncho62 View Post
Just me, but since you have no experience with rebuilding an engine, I would look for a decent running used on. A lot of damage in that one and there may be more than you are seeing.
If you want to rebuild an engine and get some experience, start with something that is just worn out and not damaged.....
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post #15 of 35 Old 10-16-2019, 11:26 PM
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Re: Is this blown engine rebuildable?

Stick a fork into it, that block is done unless you want to band aid it and sell the tractor as is. That is assuming the crankshaft is salvageable. I wouldn't do it, I have to sleep at night. FYI the replacement engine is a 49M877-1046, shortblock number 797510 but the tractor may not be worth putting that much money into.
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