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#4578944 - 11/19/17 12:47 PM Lawn Vacuum Engine Replacement...
Finz Offline


Registered: 06/06/13
Posts: 692
Loc: Northern NJ
Have a Yard Machine that I posted about previously and fixed thanks to lots of feedback

Briggs Engine Code: 12h802-1777-d1 02092557

Yesterday, while running, I heard a noise and shut it down

I donít know what the part is called but:

*. The carb screws onto a plate - 2 screws

*. The plate is bolted into the engine - 2 screws

One of the bolts which fastens the plate to the engine sheared off.

I tried extracting the remainder of bolt but failed... drilled more meat out and I tried to tap a new 1/4-20 but did a [censored] job of it and am now waiting for the lock tight to cure

Questions:

1. The engine piece onto which this plate attaches is called...what? Ideally, this piece gets replaced if possible. It has the cooling fins on it
2. Alternative Iíve been considering is simply replacing the engine with something from Harbor Freight... I wouldnít even know where to start: Iím guessing this vacuum, like a lawn mower, is a vertical shaft? And thereís all sorts of measurements on harbor freight web site... what would these refer to?

Sorry for such cryptic info... spent hours and accomplished absolutely nothing so a little burnt out and crabby

Thank you
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#4578954 - 11/19/17 01:04 PM Re: Lawn Vacuum Engine Replacement... [Re: Finz]
old1 Offline


Registered: 01/04/11
Posts: 1000
Loc: Columbus Nebraska
That is a common failure on the B&S engines. Since you messed up the threaded hole, which is also very easy to do in the aluminum block, you can tap it out to a 5/16th thread and enlarge the hole in the plate. But, the part is the engine block, so to replace it it is cheaper to replace the engine. You will have to take the engine off and measure the crankshaft to get the right engine, OR, take the engine numbers to a Briggs dealer, and if he is helpful he can look it up and tell you what the original engine specs are.
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#4578955 - 11/19/17 01:05 PM Re: Lawn Vacuum Engine Replacement... [Re: old1]
Finz Offline


Registered: 06/06/13
Posts: 692
Loc: Northern NJ
Thank you....
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#4578984 - 11/19/17 01:42 PM Re: Lawn Vacuum Engine Replacement... [Re: Finz]
Slick17601 Offline


Registered: 12/04/04
Posts: 1515
Loc: Pennsylvania
Go to Napa and geg a Keen-sert to properly repair the threads.

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#4578990 - 11/19/17 01:50 PM Re: Lawn Vacuum Engine Replacement... [Re: Slick17601]
HangFire Offline


Registered: 08/21/13
Posts: 2506
Loc: Central Maryland
Originally Posted By: Slick17601
Go to Napa and geg a Keen-sert to properly repair the threads.

Or Time-Sert, or Heli-Coil... there are options here.
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#4579043 - 11/19/17 02:27 PM Re: Lawn Vacuum Engine Replacement... [Re: Finz]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Correct crankshaft for Type Number 1777 is:
Briggs & Stratton 694478



Finz - If you replace the engine, you'll need an engine with that same crankshaft measurement.

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#4579074 - 11/19/17 03:03 PM Re: Lawn Vacuum Engine Replacement... [Re: Finz]
NormanBuntz Offline


Registered: 07/27/13
Posts: 2123
Loc: Outer Banks, NC
A good internet source for OPE parts is Jack's Small Engines. Try Google. Jack's has parts diagrams so long as you know your Yard Machine model number. They also have good service and prices.
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#4579110 - 11/19/17 03:24 PM Re: Lawn Vacuum Engine Replacement... [Re: Finz]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
What you do is measure from the end of the crankshaft to the engine mounting flange like this:

How to measure crankshaft length for replacement engine

Finz - I think your engine might be a 25mm x 3-5/32'' crankshaft size but not sure.

http://www.smallenginewarehouse.com

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#4579283 - 11/19/17 05:42 PM Re: Lawn Vacuum Engine Replacement... [Re: NormanBuntz]
Donald Online   content


Registered: 03/21/04
Posts: 20456
Loc: Upstate NY
Originally Posted By: NormanBuntz
A good internet source for OPE parts is Jack's Small Engines. Try Google. Jack's has parts diagrams so long as you know your Yard Machine model number. They also have good service and prices.


I have had good and bad results with Jacks. I might still go to them but would not be the first place I called for parts.
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#4579696 - 11/20/17 04:37 AM Re: Lawn Vacuum Engine Replacement... [Re: Merkava_4]
Finz Offline


Registered: 06/06/13
Posts: 692
Loc: Northern NJ
[quote=Merkava_4]What you do is measure from the end of the crankshaft to the engine mounting flange like this:

How to measure crankshaft length for replacement engine

Finz - I think your engine might be a 25mm x 3-5/32'' crankshaft size but not sure.




Thanks Merk and everyone for the feedback
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