Could use some help/advise

[struggle]

Today I am picking up a 630A stump grinder. Getting it from the original owner. One cylinder is out on the engine. What I want to do is put a briggs and Stratton 30 hp engine on it.

The 630A looks quite easy as a servicable.

Has anyone done this with success? Will the twin be able to run it as far as torque difference or rpm range. I know this is an old unit but the price will get me in the business fairly cheap ($700) and once it is set up I hope to have complete reliable running unit for under $4K or less.

The guy has been doing stumps in this area for 30 years and I will asorb his calls for stump as well by buying this unit from him.

I have been doing tree removals and trimmings and talked to my insurance man and they put coverage on the policy that will include the grinder liabiltiy insurance.

Going out and buying a $25K new grinder is not an option at this time.

 

[struggle]

I have the unit here at the house now. My thought was a new motor with modern technolgogy might serve better than a 30 year old design.

Provided I can fit a different style motor on the unit. As I see it the new design units use the twin cylinder style engines now. My concern would be torque on teh new motors verse the twin.

Cost would seem cheaper to go with the twin over rebuilding the wisconsin. I have no prior knowldege of working on that engine so I would most likley have to have someone else do the engine as I am sure it will have to be bored and then wonder on the condition of the crank.

I am open to ideas on this. I am going to start removing the engine this afternoon. It has 75 psi on three cylinders and 15 on one.

 

[hunthawkdog]

heres your advice

I have a veremer big whell freshly painted and tuned 2 brand new never used teeth 5k

 

[hunthawkdog]

I have a veremer big whell freshly painted and tuned 2 brand new never used teeth 5k

brand new teeth 2 sets and lots pockets some old teeth its an animal

 

[struggle]

I removed the engine this afternoon and removed the ehad on teh side with low compression. Cylinder looks good. It has a burnt valve. I was expecting worse.

Local impletment place that rebuilds these engines says minimum $2K to overhaul and maybe more. The piston can be rocked back and forth a bit. Not sure how tight these engine run for tolerences since it is aircooled I am assuming pistons are notg oing to be as tight as a watercooled engine like a car.

My goal is to not be anymore than $4K so if the engine overhaul does not go over $3K I should be fine. At least then I would know what I have after a rebuild rather than looking for another unit which is not an option for now.

What is ideal compression for these engines?

 

[hunthawkdog]

advise

We got a couple amish down here that are pretty good with wisconsen they thoutht they could rbuild mine for about 1200. it would even a better deal if i orderd all parts online and deliverd the package and hd them provide labor only ther working out of an old atalog

 

[struggle]

A place north of me 10 miles has rebuilt many of these engines and I am told they know them very well. I am going to talk to them tomorrow to try and get best and worst case on cost.

After looking at the crank shaft diameter almost 1 1/2" I think the 1 1/8" on the briggs won't do well. Overall how heavy duty these engines are I am doubtfull the Briggs 35hp would be heavy enough to handle the abuse that this wisconsin can take.