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Discussion Starter · #1 ·
Can any one tell me if there is a direct replacement engine for Gravely Rear Engine lawn mower
 

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Is it a two cylinder Kohler? 16G tractor? That is an M18 engine.

I just repowered mine. I have trouble linking stuff on this tablet, but search for my thread "latest 16G Improvements", in the last few pages you can read about my repower kit from Repower Specialists.

Sheldon

UPDATE: Link to my thread and the repower

Latest 16G improvements
 

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'81 Gravely tractor, 50's 60's 70's 80's 90's Gravely tractors
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Briggs, Honda and Kohler engines are all offered in Re-power kits. If you get the Kit, it has most everything you need to Re-power it.
Some of the kits have the exhaust already made just for the Re-power and come with instructions for any 'Re-wiring' that has to be done for installation.
The engines come with the adapter plate. The only thing you might have to do is calculate what shims you need for the bevel gear. Some of the kits are built to use your existing shims so you just bolt the engine right in and use your bevel gear,shims and thrust bearing.
You just have to re-route some cables and connect the wiring harness and they are ready to go.
As long as you do not have a 'Lift-able' rear hitch, they go right in. If you have the lift-able rear hitch, you will have to do some modifications to the hitch lift linkage from under the seat to the hitch by modifying the 'Rock Shaft' and the lift bars.
 

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Briggs, Honda and Kohler engines are all offered in Re-power kits. If you get the Kit, it has most everything you need to Re-power it.
Some of the kits have the exhaust already made just for the Re-power and come with instructions for any 'Re-wiring' that has to be done for installation.
The engines come with the adapter plate. The only thing you might have to do is calculate what shims you need for the bevel gear. Some of the kits are built to use your existing shims so you just bolt the engine right in and use your bevel gear,shims and thrust bearing.
You just have to re-route some cables and connect the wiring harness and they are ready to go.
As long as you do not have a 'Lift-able' rear hitch, they go right in. If you have the lift-able rear hitch, you will have to do some modifications to the hitch lift linkage from under the seat to the hitch by modifying the 'Rock Shaft' and the lift bars.
I don't have a lift-able hitch on my tractor, but I do have the vacuum bagger which uses a brace similar in design to the lift-able hitch. My Kohler kit from Repower Specialists fit fine and they were even able to supply the correct adapter for the drive pully for the vacuum bagger.

So, because the parts are similar, it is quite possible their kit would work with the later model version of the lift-able hitch.

2502006


Sheldon
 

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'81 Gravely tractor, 50's 60's 70's 80's 90's Gravely tractors
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I don't have a lift-able hitch on my tractor, but I do have the vacuum bagger which uses a brace similar in design to the lift-able hitch. My Kohler kit from Repower Specialists fit fine and they were even able to supply the correct adapter for the drive pully for the vacuum bagger.

So, because the parts are similar, it is quite possible their kit would work with the later model version of the lift-able hitch.

View attachment 2502006

Sheldon
The nice thing with the bagger mount is it will fit all of the Re-power kits because that hanger support bracket doesn't move and is out of the way far enough from the engine.
The problem with the lift-able hitch was it was only built for the singles and the Onan twin back in the days when they were available from Gravely.
Gravely made a couple of different 'Rock-shafts' and the actual hitch. Some were a single lift bar, others used 2 bars, so they had either a single or a twin arm rock-shaft that were designed close to the engines from the earlier models of that time with the engines available then.
When they came out with the 'G' series after the '800's and 8000's' they stopped making the lift-able hitches, which meant no more tillers for them.
They didn't make them for the 'Magnum' or 'V-Twin' equipped engines that were available for the 'G' series, so if you wanted to install one, you had to do some modifications so it would clear the engines and exhaust mufflers on them, especially the 'Magnum' exhaust from where it was located, or you would have to do a lot of work to move the exhaust system for clearance.
I modified my 'Rock-shaft' and the one lift arm on the right side to clear the stock muffler for my 'Magnum' engine.
If I was to 'Re-power' my tractor again with a 'V-Twin' I would have to modify the left side of the 'Rock-shaft' to clear the left side of the engine and exhaust because that is where they mount most of the 'Re-power' engines exhaust mufflers now.
I have seen some modified 'Rock-shafts' that were made longer/wider and had straight arms with straight bars down to the hitch on them to fit the 'V-Twins'.
I use my tiller a lot and also use a rake mounted to the hitch a lot so the hitch comes in handy and gets a lot of use out of it.
If you ever come across any of them that were modified to fit some of the 'V-Twins' and 'Re-powered' units, post some pictures or let me know and how they work.
I will try to post a few pictures of mine after I modified it. I also had a custom mount plate made for mine that bolts to the bottom of the engine and the hitch arms that mount to the rear axle to help give them support for the extra weight they carry, especially with using the tiller because that puts a lot of load on them, especially when the tiller digs in and bounces around.
Those hitch arms are expensive to replace when you break them.
 

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The left side is the stock set-up, the right side was modified to clear the muffler on the Magnum engine.
That is on a 8000 series tractor that was Re-powered with the Magnum engine.
You can tell it is the older tractor by the forward and reverse clutches, they are the 'Older' style 'Cam' type clutches which worked better and could 'Lock' in reverse.
 

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Did some more checking to be sure I was remembering correctly.

I have a 1989 price list showing the tiller, hitch and all necessary parts to use it on G series Kohler twin tractors.

Of course what you have done with yours is better with the double arm version, and I like the idea of attaching the main hitch frame to the engine.

The tiller and lift-able hitch was discontinued by the mid 90's when I bought my tractor. From then on they promoted the idea of putting the two wheel plow or the cultivator on the front of the four wheel tractors.

The vacuum bagger had a bracket that allowed sone movement but also tied the engine and hitch frame together.

Sheldon
 

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Discussion Starter · #10 ·
Can any one tell me if there is a direct replacement engine for Gravely Rear Engine lawn mower
Thanks to all who responded. Yes it is 2 cylinder Kohler. BEEN LOOKLING AT THE NEWER ZERO TURN BUT THEY ARE NOT HALF THE MOWER MY OLD GRAVELY IS. BOUT DECIDED TO REPOWER IT. HAVE 6 OR 7 OF THEM LOL
 

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'81 Gravely tractor, 50's 60's 70's 80's 90's Gravely tractors
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Did some more checking to be sure I was remembering correctly.

I have a 1989 price list showing the tiller, hitch and all necessary parts to use it on G series Kohler twin tractors.

Of course what you have done with yours is better with the double arm version, and I like the idea of attaching the main hitch frame to the engine.

The tiller and lift-able hitch was discontinued by the mid 90's when I bought my tractor. From then on they promoted the idea of putting the two wheel plow or the cultivator on the front of the four wheel tractors.

The vacuum bagger had a bracket that allowed sone movement but also tied the engine and hitch frame together.

Sheldon
I also have the 2 wheeled tiller that I mount to the front of the tractor. That thing works very well. It tills between the wheels so I don't drive through the tilled soil like I do when I use the rear tiller.
I make 2 passes when I till so I break up the soil very fine. If you would step in it after it's tilled, you would sink in at least 6 inches or more.
 
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