1650 Engine trouble coming?

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Tom Evans
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1650 Engine trouble coming?

Postby Tom Evans » Sun Aug 12, 2018 9:00 am

I have a 1650 built in 1975 that I use as my regular mowing tractor on a 3/4 acre lawn. I have a 20 degree hill that I mow at the back. Lately it has been struggling climbing the hill and occasionally belches black smoke out the exhaust, until it gets back on level ground. No oil leaks that I can detect. I have the rear wheel weights still on from snow plowing. Is there Anything other than a compression test I should check? If so, what is a satisfactory compression reading? Is trouble just around the corner? Thanks for any help, Tom.

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Shane Nelson
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Re: 1650 Engine trouble coming?

Postby Shane Nelson » Sun Aug 12, 2018 10:44 am

Head gasket. Had a mower recently doing the same thing and put a new head gasket on it and it was like new.
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Bill Hudson
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Re: 1650 Engine trouble coming?

Postby Bill Hudson » Sun Aug 12, 2018 11:59 am

Shane Nelson wrote:Head gasket. Had a mower recently doing the same thing and put a new head gasket on it and it was like new.


My thoughts, as well.

Bill
"The probability of life originating from accident is comparable to the probability of the unabridged dictionary resulting from an explosion in a printing shop." Edwin Conklin, biologist

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dgrapes59
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2-1955 Loboy w FH
a few plows, discs, mowers, blades, carrier & such
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Re: 1650 Engine trouble coming?

Postby dgrapes59 » Sun Aug 12, 2018 1:15 pm

Bad head gaskets are a common occurrence and pulling the head to "de-carbon" is also a maintenance task often overlooked. You will likely have some visible oil residue on the engine around the head area. While you have it apart it's a good time to clean out any grass and mouse nest evidence behind the tins to aid in cooling. Something often overlooked when changing the head gasket is inspecting and truing the head. Being aluminum they tend to warp over time, probably causing the gasket failure. Jeff in PA did an excellent job on a "how to";. viewtopic.php?f=141&t=56106&p=462489&hilit=Kohler+head+gasket#p462489
Suggest following it, time well spent :wink:

Good luck,
David

Tom Evans
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Location: Centreville, MI. 49032

Re: 1650 Engine trouble coming?

Postby Tom Evans » Sun Aug 12, 2018 4:22 pm

Great how to article. Is there an engine manual on the server that might specify the torque specs on the 16HP 1650 engine? Thanks for all the help. Tom

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dgrapes59
10+ Years
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Posts: 3316
Joined: Sun Jul 13, 2008 10:05 pm
Zip Code: 45067
Tractors Owned: 1951 Cub
2-1955 Loboy w FH
a few plows, discs, mowers, blades, carrier & such
Several '61 CC Originals, CC Narrow Frames- 70 & 100's, 71, Couple 102's & 122's, 72, 124, 73, various CC options & implements #1 & 2 Trailers, 1963 Springfield, JD 770
Circle of Safety: Y
Location: OH, Trenton

Re: 1650 Engine trouble coming?

Postby dgrapes59 » Sun Aug 12, 2018 6:33 pm

Looks like the 16 hp has 1 more head bolt than the 10 - 14 hp., but same 30 lb. torque (in steps). I couldn't find the manuals here, but here's a link with the info:

http://cubfaq.com/kohlertorquespecs.html

Good luck,
David

Tom Evans
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Posts: 134
Joined: Fri Jul 02, 2004 7:12 pm
Zip Code: 49032
Location: Centreville, MI. 49032

Re: 1650 Engine trouble coming?

Postby Tom Evans » Tue Aug 14, 2018 5:45 pm

Ordered a new head gasket today and started the tear down to remove the head. After an hour I got to the bolts to remove the head and there's a 2 inch crack in the center of the head. Pulled the head and the crack goes all the way through. I see no evidence of blow-by on the gasket. So now I'm on the hunt for a replacement head. New runs about $180-$250, used is slim Pickens on the internet. I'll start cleaning the block surface tomorrow, but I see no damage to anything except the head. Any suggestions on where I can obtain a good used head?

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dgrapes59
10+ Years
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Posts: 3316
Joined: Sun Jul 13, 2008 10:05 pm
Zip Code: 45067
Tractors Owned: 1951 Cub
2-1955 Loboy w FH
a few plows, discs, mowers, blades, carrier & such
Several '61 CC Originals, CC Narrow Frames- 70 & 100's, 71, Couple 102's & 122's, 72, 124, 73, various CC options & implements #1 & 2 Trailers, 1963 Springfield, JD 770
Circle of Safety: Y
Location: OH, Trenton

Re: 1650 Engine trouble coming?

Postby dgrapes59 » Tue Aug 14, 2018 7:10 pm

I would check with Ray Weaver, good guy with tons of parts. Phone call is the best way to contact him.
*Edit* his info came from an older post I think he has moved but phone should be correct...

We are a Cub Cadet Salvage yard specializing in Cub Cadets. We have 150 Cub Cadets here and have most parts pulled and ready to be shipped. We have in stock a lot of attatchments, tillers, mower decks, snowblades, snowblowers, and Brinly attatchments. We ship almost daily with UPS and United States Postal System. We can also truck frieght on large or heavy items. Thanks!

Contact Info:
Ray Weaver
315 Schoeneck Rd
Stevens PA 17578

phone: 717 587 3727 e-mail: rmweaver5@dejazzd.com
Website: http://www.raysihparts.com
David

Tom Evans
10+ Years
10+ Years
Posts: 134
Joined: Fri Jul 02, 2004 7:12 pm
Zip Code: 49032
Location: Centreville, MI. 49032

Re: 1650 Engine trouble coming?

Postby Tom Evans » Tue Aug 14, 2018 7:49 pm

Thanks david. I'll give him a call in the am. Tom


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