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Old 05-06-2015, 07:03 PM   #1
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Is my mower engine toast?


Felt like I hit something when I started mowing. Then I noticed the oil was low and there's a crack...
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Old 05-06-2015, 07:14 PM   #2
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Very likely a broken connecting rod or some such--does it still run right?
What engine?
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Old 05-06-2015, 07:31 PM   #3
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Well, I didn't actually hit anything and the mower won't turn over now. it's just makes one click. It's a Husquavarna ztr mower with a Briggs 33000 ohv engine
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Old 05-06-2015, 08:08 PM   #4
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Can you see the crack below the bolt in the pic. I was starting to think it threw a rod
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Old 05-06-2015, 08:21 PM   #5
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I believe you can kiss that one good bye.
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Old 05-06-2015, 08:47 PM   #6
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Yeah, I have a feeling you're right. I just pushed it back to my workshop. I tried to turn the top of the engine where the mesh deal that spins is and it didn't budge. I was lookin up new engines. Can you guys give me an idea of how tough of a job it is to replace it?

Can I get larger/better engine or do I need to put the same thing back?
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Old 05-06-2015, 10:04 PM   #7
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It's not a cheap replacement.
Go to www.partstree.com
Click on the Briggs/Stratton logo,and then enter your engine #s . It will give you a price on a new engine.
You can get a larger engine,IF the mount holes are the same,IF the crank shaft is the same length,and diameter,and IF the electrical connections are the same.

Last edited by JD367; 05-06-2015 at 10:14 PM.
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Old 05-06-2015, 11:38 PM   #8
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Thanks for the help guys. My engine is the 33m777-1583-B1. I did find it at partstree but I'm not sure what parts I need? Just a new engine? How extensive is this repair? It seems doable, I'm just not sure how the engine is attached to the two transmissions?
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Old 05-07-2015, 12:31 AM   #9
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With the crack in the engine block,the only recourse is a new engine.
The engineactually should drive a belt that runs both transaxles.
What model # is the ZTR ?
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Old 05-07-2015, 01:15 AM   #10
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Now the Problems that may come up:
These engines are usually ordered by the makers of the tractor,to their specifications.
This means that the same #'s on a Husqvarna, won't necessarily be the same as the same #s on a Toro,or Cub Cadet engine.
The crankshaft must be matched for diameter/length/ type of key- way and bolt threads and length of the pulley bolt.
You must also know the size,and type, of alternator,and the connections for it.
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Old 05-07-2015, 01:40 AM   #11
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It's a Husquavarna rz4621. I'm not sure where to find the specs for the mower I have...

I found a few that look like what I might need
http://www.smallenginesource.com/bri...46-p-4021.html

http://m.ebay.com/itm/Briggs-Stratto...-/361073474126
I also found a few that had a picture of the engine block only that were about the same price as the the two I posted. So not to sound stupid, but the two links I posted will come with the engine block attached?

This looks like the one... http://vi.raptor.ebaydesc.com/ws/eBa...=1430981072041

Last edited by GreenerT; 05-07-2015 at 01:47 AM.
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Old 05-07-2015, 01:53 AM   #12
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Those are complete,ready to install engines.Bolt them on,add oil,and start them.This is what you need,since your engine,most likely tore up the rod,and a few other internal parts.
However,they may not have the same crank shaft sizes,as I stated,earlier.
They must match,or you won't be able to use them,and they aren't returnable,in most cases. Let me do some checking with My Briggs Rep,and I'll find the one you need.It might take a couple of days,though.
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Old 05-07-2015, 03:05 AM   #13
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That would be amazingly helpful. From what I could tell, it looks like the Briggs vert 33 is the same on most of these mowers, but I definitely want to know for sure before I spent that much on something I can't return.
I have a farm here in east KCMO and this will be our third season with this mower. I kinda need it to hang in there for a few more seasons at least. By then I can get a tractor with a pto and a few attachments. I can think of a half a dozen attachments I could use. I have a bachelors in horticulture and I wish I had a minor in small engines right about as well.
Thanks for your help
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Old 05-07-2015, 06:29 AM   #14
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It's fairly common for engines to be sold without a starter and sometimes even without a muffler. Besides the crank diameter and length it would be wise to check on those items too.
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Old 05-07-2015, 06:53 AM   #15
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If you would like some more detailed technical advice, you can snoop around a forum "lawnsite." They have guys on there that do this for a living on commercial mowers. If you go there post a few good pics. You will get some excellent advice, as well as a few smart a** comments to junk the homeowner mower, but the experienced guys will guide you.
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