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Discussion Starter #961 (Edited)
Mikey, good to hear from you. It went pretty easy, but then again I have been turning wrenches as a hobby all my life, and I have had an engine off a GRAVELY before.

Yes, it is very nice, lots of power, very smooth. I have been considering this for a while, I could tell the Magnum was getting tired.

It might have only had 1000 hours, but that was 1000 hours of teenage drivers, running the bagger vacuum and the deck, plowing 7,000 sq ft of driveway for 23 years......and most recently cutting about 3 acres every week for the last two years. It was always working hard.

It was more money, but I'm glad I went with the Kohler over the Briggs Vanguard. The Vanguard is fine engine, no question, but after reading the repower threads about the Vanguard, the wiring issues some describe, exhaust clearance (which they do seem to have fixed), and a front drive for my vacuum bagger were all questions that were not answered.

With the Kohler the exhaust is the only issue, I will come up with something better.

And while I did not really need any tech support, I did have a few questions, both before and during, and the people at Repower Specialists were great.

They were not familiar with the bagger/vacuum, but once I described it, they knew exactly what I needed and added the spacer to the kit, no charge.

They had the wiring correct in their instructions, compared with Small Engine Warehouse who says right on their web site they have no idea how to wire the Briggs to a G series tractor........

Anyway, I would strongly recommend the kit I bought, despite the less than ideal exhaust.

It seems the Kohler is fully compatible with all of the original rear attachments, the vacuum, the liftable hitch, the rear PTO, not so sure about making them all work with the Briggs.

I guess that's not important unless you have those attachments.

Sheldon
 

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Good read!

My latest 16G (1999/2000) has a Briggs Vanguard (ohv). Mine has <550 hours. Compared to the Kohler Magnums (flathead), it is quieter and smoother. Anyway, I only mention this to say a newer Vanguard may well fit the accessories.

Good luck with the new engine. Yeah, I agree. Another 25 years are ahead of you!
 

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Discussion Starter #963
Mikey,

Again, the Briggs is a fine engine and I know GRAVELY used them briefly at the end of G series production.

I could be wrong on the details, but it was my understanding from some literature I saw somewhere, that by 1998 or 1999 the vacuum bagger, the rear PTO, liftable hitch and rear tiller had all been officially discontinued once all the tractors were Briggs and Robins powered.

I have a 2002 dealer price list, and there is no mention of the 4 wheel tractors at all.....

There is nothing in the GRAVELY parts radar to show/suggest that GRAVELY ever developed a rear drive kit for a Briggs or Robins engine to power the vacuum bagger.

That's not to say it could not be done, but I tried to look into the availability of of those drive accessories from Briggs and was unable to find those parts from Briggs or GRAVELY.

So, those accessories may be able to be made to work, the necessary adapter to put the pulley on the engine may exist. But I could not find it, and I can find no evidence GRAVELY ever provided it.

And with the right earlier parts, the rear PTO, liftable hitch and tiller may work fine, I believe some have done it on Robins powered tractors.

But I was able to confirm in advance that the Kohler would work with the vacuum.

They have since changed their site, but years ago Small Engine Warehouse had a picture of a tractor with a vacuum bagger and warned customers that their Briggs kit would not work with that accessory?

It would be interesting to know if anyone has worked it out, or not?

Sheldon
 

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The flywheel adapter for the Subaru Robin EH series was definitely available new until recently.



Running the rear hitch setup on a Robin or Briggs powered tractor should not be an issue. I could do it, but choose not to as the 20G has 23x10.50s which are not good for garden work, as they are too wide. But in terms of engine clearances with the proper offset arm rock shaft, it should work.

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Discussion Starter #965
Thanks RedRider, that at least answers most of the questions, but it still leaves open the one that applies to me, running the vacuum bagger with a Vanguard.

Again, I am very happy with the new Kohler, and will update my final exhaust solution.

Personally I never had any need for the rear tiller, but did play around a bit with a front mounted new style cultivator. Should have kept it, but sold it thinking I would never use it.

Sheldon
 

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I just discovered that the same part # for the Subaru EH flywheel adapter appeared earlier in this very long thread.

As for the Vanguard, I cant speak to them but personally would never own one. The Subaru Robin EH series is a good choice if you already have the adapter plate and you can find one, but I believe parts are going to be difficult to get as time goes on.

The Kohler was probably a good choice. I really like their Command series on the later 2 wheelers and the newer Rokons. Amazing little industrial engine.

I think redirecting the heat out from underneath the rear fender is a worthwhile goal with your exhaust solution.

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Hi Sheldon, I have been following your repower of your Gravely Rider. Having a 12g myself l often though of using motorcycle heat wrap on the exhaust pipe and installing a heat barrier insulation on the underside of the cowl. Perhaps a remote cooling fan might be able to be set up to blow heat away from the engine. I have been thinking about installed one to blow air on the head and exhaust pipe for some time. In the motorcycle industry Love Jugs makes them for Harley's. Something like that may be installable to help cool off the engine and exhaust..
 

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Discussion Starter #968
I just discovered that the same part # for the Subaru EH flywheel adapter appeared earlier in this very long thread.

As for the Vanguard, I cant speak to them but personally would never own one. The Subaru Robin EH series is a good choice if you already have the adapter plate and you can find one, but I believe parts are going to be difficult to get as time goes on.

The Kohler was probably a good choice. I really like their Command series on the later 2 wheelers and the newer Rokons. Amazing little industrial engine.

I think redirecting the heat out from underneath the rear fender is a worthwhile goal with your exhaust solution.

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I have heard both good and bad about the Vanguard, but way more good than bad. That said, I have generally come to believe you get what you pay for in most cases. I think the Kohler is more expensive for good reason, not just because they can get it.

I never hear anyone complaining about the Command Pro series, and while the parts come from all over, they are still assembled here by people who work directly for Kohler. There are a lot of them on a lot of high end commercial machines.

I still have mixed thoughts about the various exhaust solutions, and still open to hear what anyone thinks about dual vs single exhaust on these engines.

Sheldon
 

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Some day you'll have to tell us which tool truck company you worked for back in the day, and your opinions on their toolboxes.

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Discussion Starter #970 (Edited)
That's not a big secret, I sold MATCO TOOLS, and they make one of the best tool boxes you can buy, partly because they are the only company in that industry who actually owns their own tool box factory. It is located in Jamestown, NY.

Still made in the USA.

Sheldon
 

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Sheldon, I completely understand your reasoning for the Kohler. I would probably have done the same were I doing what you did. Lack of hassle and "pre-solved" problems are always a plus!!

(y)
 

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Discussion Starter #972
UPDATE:

After getting all the mowing caught up, I was actually forced to go to work and make some money. I also put the old engine and all my Magnum spare parts and accessories up for sale on Ebay........they are all sold.

The CH730 uses the same oil filter, I am stocked up..........

I nearly burned myself twice on that muffler that I said in the beginning may need a guard.........

I got some other parts in for exhaust experiments, but have not had time to explore that yet. And I can't seem to find or get any opinions on dual vs single exhaust. Your thoughts are welcomed.

Sheldon
 

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I would think as with vehicles dual echaust would have a slightly louder and un even sound. Just depends on your prefrence

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This may be immaterial, many of my ideas are, but I think dual exhaust is more efficient in dissipating the heat. More surface area? The 2 outlets are spaced apart? Plus i think 2 smaller mufflers gives you more location options

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Discussion Starter #976
Thanks everyone for your thoughts on the exhaust question. I'm still working on the options, more on that later.

The 18-GLX had another problem, unrelated to the engine replacement.

It seems that in my busy last two years, I have done only minimal maintenance, and some of that caught up with me last week.

The left rear lug nuts came loose, hidden by the wheel weights, and damaged the rim.

Fortunately I discovered the problem before any other real damage occurred. I did have to replace the wheel studs and lug nuts. Yes my tractor had studs and lug nuts, a conversion I did when I installed the individual rear wheel brakes. You can read about it somewhere in this thread.......

So the challenge has been finding a correct wheel, in some sort of decent condition........

The used market did not offer any correct, quick solutions. So despite a rather high price, I ordered a wheel from GRAVELY. Then when I found out they only had six left and the part was obsolete (meaning they will not make more when stock runs out), I ordered a second one.

Glad I did.

Some of you will remember, and some of you have 18-G and 20-G tractors, which have wider rear rims.

In previous conversations on this forum about wheels, and tire sizes, it seemed there was little or not documentation from GRAVELY about these wider wheels.

Guess what, I ordered what I thought would be the 12x7 rims that came on my 16-G tractor, that GRAVELY used for decades, with the correct offset and inside valve stem hole - but no, the part number in the IPL that came with my tractor, before the wider wheels even appeared from what we could figure out before, is old #048922, new #20928100, and has not been superseded to a new number. But what was delivered was a nice shinny new 12x8.5 rim, also with the correct GRAVELY offset and inside valve stem, just like the wheels many of you have on your newer 18-G and 20-G machines..........

Lucky for me I bought 23x9.50-12 tires when I replaced them a while back, I don't think 23x8.50-12 tires would be happy on the wider rims......

Pictures and more data later.

Sheldon
 

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Discussion Starter #977
So, I don't know if any of you will be able to see the difference in these wheels from these photos, but here goes:

Original wheel

2465620



New wider wheel

2465621


Both with my 23x9.50-12 tires.

The wider rim did change the profile of the tire somewhat. Hard to see in these photos, but here goes:



2465622


The left side is the new wider wheel.

2465623


2465624



Clearance issues only changed slightly and I don't think there will be any problems.

Now I am waiting for the second wheel to show up...........

After I had ordered the first wheel, a solution did show up on Ebay. A used set of 12x7 wheels that have been sandblasted and epoxy primed. And while apparently not off a GRAVELY, they are the correct offset and inside valve stem.

The price was low enough, so I snatched them up just in case:

2465625


2465626


The centers are slightly different from my old GRAVELY wheels, but they have the same markings inside as my original GRAVELY wheels - FIRESTONE 12x7JA - wondering if the JA was a code for the offset?

Of course these would need to be painted, another time issue related to this latest problem.

More later,

Sheldon
 
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