1872 - Kohler 28 EFI repower

[Sam Mac]

You have done a nice job on that one. One issue I see is that the fan is on backwards. Funny thing about it is I have never seen one like that. What did it come off? This is the type I've seen, it's from a 2000 series or a Cyclops. You'll notice that both your fan and my fan are mounted so that the dish in the center is forward but your blades are curved in the opposite direction from the one I have.

[cyr2872]

Originally Posted by Sam Mac

You have done a nice job on that one. One issue I see is that the fan is on backwards. Funny thing about it is I have never seen one like that. What did it come off? This is the type I've seen, it's from a 2000 series or a Cyclops. You'll notice that both your fan and my fan are mounted so that the dish in the center is forward but your blades are curved in the opposite direction from the one I have.

Ha...I was wondering about that. I had forgotten which way it went and had a sneaking suspicion that I put it on backward. I was going off which side was cleaner was the side pushing the air; apparently my assumption was wrong. The fan came off the 1872 drive shaft which had the disconnect clutch.

[cyr2872]

More pictures of the fuel system set up:

[Sam Mac]

Originally Posted by cyr2872

Ha...I was wondering about that. I had forgotten which way it went and had a sneaking suspicion that I put it on backward. I was going off which side was cleaner was the side pushing the air; apparently my assumption was wrong. The fan came off the 1872 drive shaft which had the disconnect clutch.

You can just flip the fan around and mount it on the front side of the drive shaft coupler. If the shaft gives you trouble the shaft from a 2284 should bolt in. You may need a different rear adapter. I make them if you do. You should have plenty of Gitty Up with that beast.

Looking at the muffler I'd probably just run the exhaust out through the side considering that the muffler looks like the O2 sensor is mounted in it. Just my 2 cents. Awesome build.

[cyr2872]

Originally Posted by Sam Mac

You can just flip the fan around and mount it on the front side of the drive shaft coupler. If the shaft gives you trouble the shaft from a 2284 should bolt in. You may need a different rear adapter. I make them if you do. You should have plenty of Gitty Up with that beast.

Looking at the muffler I'd probably just run the exhaust out through the side considering that the muffler looks like the O2 sensor is mounted in it. Just my 2 cents. Awesome build.

Yeah, I'll flip it around tonight. Shouldn't be an issue. The muffler came with the engine so it had the O2 sensor already mounted. I planned on running the exhaust out the side. The price of a new center output muffler is ridiculous; plus the added headache of welding in a new O2 sensor bung and getting the right placement for a proper reading is not worth it. Also, with the side output adjusting the belt is a little nicer since I won't get exhaust blown in my face.

[cyr2872]

After flipping the fan around and replacing the leaking check valve with another I had from the hydrostat that came with the cast rear...It's time for the first mow!

I rebuilt the 50C spindles with new bearings and seals. Had some extra POR15 so I coated the underside to combat some rust and hopefully let the deck clean out better.




Had to repair the right wheel/deck, it was cracked along the old weld. I'll add a brace to give it more strength soon.


I also made a heat shield from an extra set of M18 shrouds I had. Turned out well and definitely helps with the heat.

[ACecil]

Good work! Enjoying your thread.

[cyr2872]

After 1.5hrs of mowing everything ran great. Love the power of the new engine and I really love the power steering. The 1872 seems so much easier to drive and turns tighter than my 782 did. I have a few hills and RPMs hardly dropped going up. Gas consumption was noticeably less. It seems now my ground speed is limited by how much the deck can handle, however I was going much faster than I did on my 782 and in 6" tall grass; running about the 2nd indicator mark on the hydrostat.

The only issue I did see was air/oil coming out the breather of the cast rear. Not sure if this is normal on the fresh rebuild (just working excess air out of the system.) It seemed to stop by the time I was done mowing.
Overall...I love this thing!!

[Leadslingingdaddy]

Outstanding! I have a 20hp N/A Command to go in my 1872 when the Mag gives up but currently it is running strong with 1020hrs on it...

[Oak]

cyr2872, very nice job on your build.