520-8 repower

[Bens vintage tractors 1,542]

On 9/21/2021 at 4:11 PM, Sparky said:

What was the Honda originally mounted in or to? Was it a generator? Wondering what the 5000 decal references 

This engine was brand new and I bought it with 3hrs on it. Never mounted to anything but a c81 wheel horse and now this lol 

[Bens vintage tractors 1,542]

Wet sanded and polished the hood tonight. 

[Bens vintage tractors 1,542]

Here’s what the hood looked like before. 

[ebinmaine 67,596]

Nice work on the hood!

[Bens vintage tractors 1,542]

Engine is mounted, wiring is all squared away, just needs a gas tank and a battery and it should run and drive.. 

[ebinmaine 67,596]

Looks right happy in there. Nice work. 

[Handy Don 12,235]

Looking forward to hearing it running

[ebinmaine 67,596]

11 minutes ago, Handy Don said:

Looking forward to hearing it running

Me too. In person would be better.

[Bens vintage tractors 1,542]

1 step closer to hearing it run! Got the exhaust built for it. Probably my favorite exhaust I’ve ever built! 

[ebinmaine 67,596]

In the area I circled in blue does the belt hit the side of the guard?

That'd wear the belt off right quick. 

Might be fine. I can't tell from the angle. 

 

 

[kpinnc 12,087]

I really like the look of this, but I'm thinking you may want to consider raising this engine about an inch. I've had to do the same on every repower I've ever done. WH likes those deep oil pans, and matching another engine can be tricky.

 

You may get lucky without doing it, but the belt guard is an integral part of the "clutch" function on a manual tractor. It supports the belt so that it stops completely when the pedal is depressed. Without it, the belt continues turning and this causes difficult shifting, grinding gears, and uneccesary wear. 

Edited September 25, 2021 by kpinnc

[littleredrider 409]

Having a 520-8, ur gonna need to address the belt guard. Like the others stated, it's needed on the manual trans tractors for slowing/stopping belt when clutch is engaged. Almost looks like it needs to go up n towards the back for the crank to be in the spot as the original. Or could redesign the belt guard, but think that would be harder than jsut raising the engine....Curious to hear the exhaust, mines on it's 3rd since I've had it, and not spending money on the OEM!!!! Awesome build too!!

 

[Lee1977 6,666]

There is a interior flange the the bottom side of the belt lays on when the belt is stopped for changing gears. That flange is welded to the inside of the belt guard on single cylinder Kohlers. My 520-H it is bolted to the hoodstand the 520-8 drawings shows the same. With the clutch depressed the belt should lay on the flange, with the clutch out it should be above the flange. This can tell you how much you need to raise the engine.

[Bens vintage tractors 1,542]

4 hours ago, ebinmaine said:

In the area I circled in blue does the belt hit the side of the guard?

That'd wear the belt off right quick. 

Might be fine. I can't tell from the angle. 

 

 

Belt guard was just sat there to make sure I could get it off once the exhaust was on. That’s all getting cut apart today 

[Bens vintage tractors 1,542]

I have done 100s of repowers on wheel horses the belt guard was just sat there to make sure the exhaust wouldn’t come close to it. I’ve already spent a couple hours making sure the belt didn’t rub anywhere since the pulleys are swapped. I appreciate the concern from everyone but trust me I know lol 

[AMC RULES 37,130]

You gotta know Ben, you can't give these guys anything.

[peter lena 8,634]

@Bens vintage tractors really like the looks of that swap , any more details on the engine for a track down detail ?  another thing while you are trimming up that belt guard , are you going to punch some vent holes in it ?  looks like a neat go to swap , pete

[Bens vintage tractors 1,542]

1 minute ago, peter lena said:

@Bens vintage tractors really like the looks of that swap , any more details on the engine for a track down detail ?  another thing while you are trimming up that belt guard , are you going to punch some vent holes in it ?  looks like a neat go to swap , pete

Honda gx690 but a predator 670 will do just the same and those are easier and cheaper. Don’t need any vents on these vtwins they keep them selves very cool. 

[peter lena 8,634]

@Bens vintage tractors  , thank you ben, helps me to snoop around , pete

[kpinnc 12,087]

22 hours ago, Bens vintage tractors said:

Don’t need any vents on these vtwins they keep them selves very cool. 

 

Not to mention the cylinders are above the guard unlike an opposed twin.

[ebinmaine 67,596]

27 minutes ago, kpinnc said:

cylinders are above the guard

Also true. 

One of the things I'm doing on the Colossus build (flat opposed K582) is using small pieces of C or U channel to wrap the belt top and bottom instead of a full belt guard. All open area where there normally would be sheet metal. 

 

[lynnmor 7,308]

42 minutes ago, ebinmaine said:

Also true. 

One of the things I'm doing on the Colossus build (flat opposed K582) is using small pieces of C or U channel to wrap the belt top and bottom instead of a full belt guard. All open area where there normally would be sheet metal. 

 

Now that is thinking outside of the box!

[peter lena 8,634]

@kpinnc think that picture says it all , reuse of kohler  pto  attachment points and  brackets , cooler cylinders , spin on filter , pressurized lubrication  , only thing missing is a druel  bib, love it , pete

[ebinmaine 67,596]

18 minutes ago, lynnmor said:

Now that is thinking outside of the box!

Kinda the whole point on that build. Try things a little different.

[kpinnc 12,087]

11 hours ago, ebinmaine said:

One of the things I'm doing on the Colossus build (flat opposed K582) is using small pieces of C or U channel to wrap the belt top and bottom instead of a full belt guard.

 

Very nice!

 

I was gonna use flat bar, but your idea sounds better. 

 

I cut almost the whole side out on my 520-H, and never finished it. Still need to do something with it.