Flathead identification
- Thread starter Samotorsport
- Start date
Yes exactly ,
I have some flathead 13 cui 205 cc engines which i am rebuilding .
i bought the cases alone , so i don t habe a P/N . Now i wanna know how to adjust the crank endplay .
where to add a shim , which side .
i have one engine which has both sides a roller bearing , the other ones have a „bushing style“ bearing on the mag side
I have some flathead 13 cui 205 cc engines which i am rebuilding .
i bought the cases alone , so i don t habe a P/N . Now i wanna know how to adjust the crank endplay .
where to add a shim , which side .
i have one engine which has both sides a roller bearing , the other ones have a „bushing style“ bearing on the mag side
Attachments
If you are working on Briggs flatheads this is a "MUST HAVE" in your reference library. It has a section dedicated to adjusting crank endplay. This is just one listing - there are many more...
https://www.ebay.com/itm/225930420926
Michael
https://www.ebay.com/itm/225930420926
Michael
Take another look at your manual, specifically the "Crankshafts and Cam Gears" chapter, then refer to the section entitled "Crankshaft Cover and Crankshaft Endplay" If these are all aluminum engines ("Koolbore") the endplay is the same for all plain bearing and ball bearing - .002" to .008". The METHOD (location) of placing the shim washer varies between the types of bearing , but the manual explains how to do that.
Michael
Michael
Last edited:
They are I/C models , non Koolbore.
The manual explains very well how and where the shim has to come , but alway refers to the engine series , and that s exactly my problem.
the engines are going to be build up like a raptor 3 .
when i disassembled the original racing engines, the shim was located between the crankgear and the bearing , so i guess that would be the right way for a raptor 3 or I/C engine. Unfortunately i don t find anywhere to which series the raptor 4 , or double bearing engine belongs too . So i don t have a clue on where to put the shim on this type of engine.
furthermore I cannot find any info on how to measure the endplay .
on my beetle engine i measure it without conrod piston installed .
is this the same for a briggs ?
or does the piston must be connected to the crank for measuring ?
The manual explains very well how and where the shim has to come , but alway refers to the engine series , and that s exactly my problem.
the engines are going to be build up like a raptor 3 .
when i disassembled the original racing engines, the shim was located between the crankgear and the bearing , so i guess that would be the right way for a raptor 3 or I/C engine. Unfortunately i don t find anywhere to which series the raptor 4 , or double bearing engine belongs too . So i don t have a clue on where to put the shim on this type of engine.
furthermore I cannot find any info on how to measure the endplay .
on my beetle engine i measure it without conrod piston installed .
is this the same for a briggs ?
or does the piston must be connected to the crank for measuring ?
I (and that manual) cannot help you with this on a racing engine like a Raptor .The manual DOES state, however that you cannot use the end play shim washers on engines with dual ball bearings. I would advise that you post your question over at Bob's 4 cycle (see link below) as those dudes are mostly kart racers that all used the Briggs Raptor engines back in the day.
https://4cycle.com/
Michael
https://4cycle.com/
Michael
Yes , i headed over , we did not get any further on those numbers .
The 2 engines which came from the jr dragster are Raptors .
one Koolbore (easy to spot )
And 2 I/C engines .
i am currently in progress of getting the parts together and rebuilding 2 engines .
i ordered another one at Ebay.
so more to come
The 2 engines which came from the jr dragster are Raptors .
one Koolbore (easy to spot )
And 2 I/C engines .
i am currently in progress of getting the parts together and rebuilding 2 engines .
i ordered another one at Ebay.
so more to come