Briggs 5HP IC Generator

[Fish]

The first turn or two...........

 

[Fish]

Almost done...

 

[Fish]

Here........

Now to find the seat cutters....

It might take a while......

 

[Mkala]

Thanks Romore ! It has more play than intake, but yes make sense because exhaust valve become more hot.
I was able to determine valve guide is less than 6.40mm (but close).

Thanks Fish for test and pictures ! This tool looks to work very nicely !

Machining is not an option, don't know a shop near me. And now with cheap stuff I doubt lot of shops will still machine blocks, cut valves and things like this :/
On the other hand, even if tis long do something, I have all the time that the job need because I do this on my free time, and I don't count hours :smile:

EDIT :
Found the reject tool is 0.265" / 6.73mm. So my guide is in perfect state. Factory bore is 6.35mm if I understand correctly.
http://ppeten.com/forums/viewtopic.php?f=3&t=2255&start=10

 

[Fish]

I didn't notice that you were in Switzerland, the seats are usually what is way out of whack, as the block gets hot and the block/seats tend to warp away, cocking the seats.
The seat cutters cut them at 46 and 31 degrees, and that 1 degree makes a tight seal, which is why you don't really want to lapp the valves, as that will destroy the "interference' fit.
Really some neat tools. Anyone that is a Briggs and Stratton dealer should have at least the Neway seat cutter set.

 

[Fish]

Here is the seat cutter set that I have...

https://www.ezbore.net/Neway-LG-1000-Briggs19237-Valve-Seat-Cutter-Kit-p/newklg1000.htm

Somewhere....

 

[Mkala]

Yes this is definitely a nice kit. But for professionals; I don't plan to buy a lot of tool, especially specific / expensive one

In the BS flathead manual, they talk about this kit but they talk about lapping too - as the final way to make valve and seat fit together.

Reface Valves and Seats
Valve faces can be resurfaced on a commercially
available valve grinding tool. Briggs & Stratton does
not recommend this practice as a high quality repair
procedure. Valve replacement is recommended for
damaged or worn valves. Valve seats are cut using
Tool #19237 or #19343, Neway Valve Seat Cutter Kit,
to 45° on exhaust and some intake seats. Other intake
seats are cut to 30°. Valve and seat are lapped in using
Tool #19258, Valve Lapping Tool, and Part #94150,
Valve Lapping Compound, to assure a good seal
between the valve face and the seat.

 

[Fish]

The valve guide "gauge" is/was definitely a waste of money.

 

[Fish]

Since I found the seat cutter, I'll throw up the pics.

 

[Mkala]

Thnaks for the pictures !

Great tool you have there to cut seat an valve !
Ha yes the gauge can you confirm the diameter of it ?

Thanks

And by the way yes, I'm from Switzerland. This mean not really the country of small engines, at least less than North America. And for spares and tools, you can double the price in the USA and add shipping... it's like this