Predator mount details

[JAinVA 4,619]

I finally got a dry sunny day so I got some pictures of the 13 horse mount details.The mounting plate photo shows frame holes denoted by the zinc bolts and the engine holes are the 4 cad colored smaller pattern.Think of the plate as a blank canvas.The centerline of crank needs to be in line with the pto hoop hole.The Onan and pulley was left on its plate so I could tell that the outer face of the pulley was centered on the hoop hole left to right.

The hole pattern for engine mounting in the frame are not centered with each other left to right as can be seen in the 2nd picture.This is not important if the standoffs are individual but the tube had to be offset drilled.This is another good reason to use a spare Onan plate as it is already drilled to fit the frame.I swithed to custom made single standoffs for the front to make oil changes easier.If you don't want to use a Predator but rather a single cylinder Honda,

Briggs ohv or other brand of single this approach will work for all with some minor variations.Hope this helps

[chex313 123]

Jim, where did you source those custom cylinder motor mounts? I am not finding anything in my searches. The only thing I can think of is an impact socket.

[JAinVA 4,619]

Those mounts are indeed custom.I had them on my lathe.They only need to be that tall if you are putting the Pred on a hydro equipted tractor.If you put the Pred on an 8 speed then you could get by stacking washers to get  around 3/8" increase in height.

McMaster Carr has what you need.Look there at the area of spacers/stand offs.The plain aluminum has tons of options .

Edited May 24, 2020 by JAinVA

[chex313 123]

1 hour ago, JAinVA said:

Those mounts are indeed custom.I had them on my lathe.They only need to be that tall if you are putting the Pred on a hydro equipted tractor.If you put the Pred on an 8 speed then you could get by stacking washers to get  around 3/8" increase in height.

McMaster Carr has what you need.Look there at the area of spacers/stand offs.The plain aluminum has tons of options .

Yes Thank you, That is what I need, I'll check Mcmaster...Its for my 520H...It will take me the rest of the summer to rebuild that Onan

Edited May 24, 2020 by chex313

[chex313 123]

My measurements have the HF at 5 1/4" and the Onan at 6/5/8" for 1 3/8" standoff. These are off a flat surface. I left the 1/8" for the mounting plate out.

 

Is this about the size you made (Below Pic)(Number 8 bolt)? Do you still have the thread size for the available holes in the side of the HF motor? The ones to be used for the PTO Plate. I do not have many metric bolts laying around.

 

Bolts for mounting? Maybe these?

Quote

Medium-Strength Class 8.8 Steel Hex Head Screw, Zinc-Plated, M5 x 0.8 mm Thread, 80 mm Long

 

 

 

Edited May 24, 2020 by chex313

[JAinVA 4,619]

The bolts I used were 3/8" diam.No metric fasteners are needed to mount.If you want to attach the pto ,SAE hardware is used and you don't need metric fasteners there either.The Onan plate is 1/4" so 1 1/4" spacer is just right.

Edited May 24, 2020 by JAinVA

[chex313 123]

I'll measure my plate again. I measured it at 1/8" and I'll try my SAE bolts...I assumed they were metric threads in the HF motor...Your replies are a great help. 

 

EDIT: Nice the SAE bolts fit. and the plate measures at 3/16"  so 1 1/4" spacer/standoff will work fine.

Edited May 24, 2020 by chex313

[JAinVA 4,619]

I checked the plate thickness and you are correct.It measures 3/16" not 1/4".I just knew it was thicker than 1/8".Thanks for jogging my memory on this conversion as I am going to fit another Pred 13 on to the 94 312 I just brought home.The Predator 13 can't beat the Onan in smoothness or power but in a pinch will allow you the time to get the Onan sorted out.Luck,JAinVA

Edited May 24, 2020 by JAinVA