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  #11  
Old 10-12-2017, 07:38 AM
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Quote:
Originally Posted by brudder View Post
Confirmed my suspicions tonight. Blown up rod and the crank is junk too. It looks like the other rod is scored inside the end that attaches to the crank too. The guy ran it out of oil and sold it to me as needing some TLC.

It's a frustrating and humbling experience for me to know that I couldn't even identify a blown up engine. The guy was an @#$%#@ to deal with and I hope karma catches up with him in the future.
I know how you feel, same thing happened to me on this one
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2264 with 54 GT deck
1641 AKA Black Jack with a 402-E Haban Sickle bar mower
1641 AKA Black Jack #2 with 46" deck
149 with a 1A Tiller
JD330 with 50" deck and 3 point hitch.
JD317 dump truck
BX2660 with FEL & Grassanator
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  #12  
Old 10-12-2017, 07:59 AM
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Sam Mac Sam Mac is online now
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I bought a new engine for it from Northern Tools
http://www.northerntool.com/shop/too...arch=6007-2851

Small Engine Warehouse also has a good price on them
http://www.smallenginewarehouse.com/...tegory=1710236

If you decide to repair your existing engine these guys are good to deal with
https://www.jackssmallengines.com/
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2264 with 54 GT deck
1641 AKA Black Jack with a 402-E Haban Sickle bar mower
1641 AKA Black Jack #2 with 46" deck
149 with a 1A Tiller
JD330 with 50" deck and 3 point hitch.
JD317 dump truck
BX2660 with FEL & Grassanator
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  #13  
Old 10-12-2017, 08:16 AM
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Sam Mac Sam Mac is online now
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This is the 1641 that I re-powered a couple years ago.
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File Type: jpg IMG_2997.jpg (27.7 KB, 147 views)
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2264 with 54 GT deck
1641 AKA Black Jack with a 402-E Haban Sickle bar mower
1641 AKA Black Jack #2 with 46" deck
149 with a 1A Tiller
JD330 with 50" deck and 3 point hitch.
JD317 dump truck
BX2660 with FEL & Grassanator
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  #14  
Old 10-12-2017, 10:46 AM
sorner sorner is offline
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Quote:
Originally Posted by brudder View Post
Confirmed my suspicions tonight. Blown up rod and the crank is junk too. It looks like the other rod is scored inside the end that attaches to the crank too. The guy ran it out of oil and sold it to me as needing some TLC.

It's a frustrating and humbling experience for me to know that I couldn't even identify a blown up engine. The guy was an @#$%#@ to deal with and I hope karma catches up with him in the future.
It happens... But if you rebuild or repower it, you'll have a good tractor.
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  #15  
Old 10-12-2017, 09:37 PM
brudder brudder is offline
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Thanks for the pics and advice, guys. Sam, my folks have a 1641 with the 46" deck like you've got. It does a pretty good job with the bagger. I bagged a lot of leaves with it in my younger years... Looks like you built a custom front end for yours. Was that out of necessity from bad plastic?

Sorner, thanks for the advice about lye via PM. I picked some up on the way home from work in case I got into it and decided I wanted to try to get the aluminum off the crank. I tore into it the rest of the way tonight.

Looks like the heat got to the crank and discolored it. Is it ruined even if I could get the aluminum off the journal?

The second pic is of the rod that isn't broken. It feels smooth but looks damaged. Salvagable?

Finally, the bore looks fine in the cylinder that the rod broke in. I can still see hatching and don't see any cracks or dents. I noticed what looked like marks from the casting or small cracks, though. They don't go through. Would that be alright if I rebuilt it?

Right now, at a minimum I'm thinking 1 new piston and rings, 2 new connecting rods, a new crank, and new gasket set to get it rebuilt. Probably at least $250. I need to think about it for a bit.
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  #16  
Old 10-12-2017, 09:55 PM
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"V" twin Vanguard engines are to rebuild! The discoloration on the crankshaft is burned oil. Take it to machine shop and have the crank polished and inspected and the bores checked for size. Metal transfer typically occurs in a lack of lube situation. If you can reuse the crankshaft, make sure the oil passage ways in it are spotless! If you go with the repower, consider Sam Mac's suggestion.
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  #17  
Old 10-13-2017, 06:35 AM
RumbleFish RumbleFish is offline
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I was in this exact position last year. Bought a clean 1641 "mechanics special" that ran on one cyl for $175. After finding that the motor was junk I was lucky enough to stumble across an ugly and beat up looking 1641 on cl for $200 that ran good. A motor swap later and we are mowing great!
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  #18  
Old 10-13-2017, 08:22 AM
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That crank will clean up, I've used muriatic acid, it takes a bit of time but it will eat the aluminum off it.
Then you can see if it is scored, which I doubt.
Of course the engine will need complete dissembled washed/cleaned thoroughly to remove the debris/crud and a through inspection for other related damage, as is standard practice.
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  #19  
Old 10-13-2017, 10:23 AM
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Quote:
Originally Posted by brudder View Post
Thanks for the pics and advice, guys. Sam, my folks have a 1641 with the 46" deck like you've got. It does a pretty good job with the bagger. I bagged a lot of leaves with it in my younger years... Looks like you built a custom front end for yours. Was that out of necessity from bad plastic?
Sorner, thanks for the advice about lye via PM. I picked some up on the way home from work in case I got into it and decided I wanted to try to get the aluminum off the crank. I tore into it the rest of the way tonight.

Looks like the heat got to the crank and discolored it. Is it ruined even if I could get the aluminum off the journal?

The second pic is of the rod that isn't broken. It feels smooth but looks damaged. Salvagable?

Finally, the bore looks fine in the cylinder that the rod broke in. I can still see hatching and don't see any cracks or dents. I noticed what looked like marks from the casting or small cracks, though. They don't go through. Would that be alright if I rebuilt it?

Right now, at a minimum I'm thinking 1 new piston and rings, 2 new connecting rods, a new crank, and new gasket set to get it rebuilt. Probably at least $250. I need to think about it for a bit.
The front end was because the plastic was junk and I didn't care what it looked like just as long as it ran good. I've done two 1641's like that.
__________________
2264 with 54 GT deck
1641 AKA Black Jack with a 402-E Haban Sickle bar mower
1641 AKA Black Jack #2 with 46" deck
149 with a 1A Tiller
JD330 with 50" deck and 3 point hitch.
JD317 dump truck
BX2660 with FEL & Grassanator
Reply With Quote
  #20  
Old 10-25-2017, 07:18 AM
brudder brudder is offline
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I was not able to clean up the crank. It is scored underneath the aluminum. I also tried polishing with some 1200 grit sandpaper with no luck.

So I'm still weighing options on rebuild or buy a new engine. I could buy a new 18hp for the same price as a new 16hp, around $1100. If I rebuilt it, it would be about $450 for two new pistons, new rods, used crank, gasket set, new filters and plugs, and a ball hone to deglaze the cylinders. I believe the heads are also warped and one of the head gaskets had blown. I suspect this because there was burned oil around where both heads bolted to the block. I read in the tech section how to flatten those out.

The 18hp should bolt right up from what I've seen. Will I be able to use the extra HP mowing thick grass or will it just burn more gas? Could I expect to run into other problems due to the overheating that it becomes more of a money pit?
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