Briggs & Stratton IC Engine Pt2 - Head Shaving and Cold Start

[ibuiltmineo1oo]

That is a huge chuck to get a whole head in there!

[BowHunt1229]

the stonehenge people are looking for their lathe....

[Aussie50]

@BowHunt1229 that would be really cool if it was :D, this one was made in Czechoslovakia as the Nazi's were on the march (1938)

[mapukmapuk]

yea i know this shit when you dont have pull start

[soverato3]

broken rings can give big problems

[CorsaAGSi]

I taped sandpaper on a mirror and shaved some off that way.

Works good to.

[MadSmokerBBQ]

cool!!!

[rchez09]

I am jealous of your stuff! All those engines and a metal lathe :)

[fritzhvac]

Damn , Ed you are the MAN !!! Lets be honest here , I'm gonna have to go as far to say, there is nothing you can't do when you put your mind to it man (very talented)!!!

I am always AMAZED !!!

Great video , great sense of humor !!!

And your LATHE, is the SHIT man !!!

[itscool1968]

shoudnat that gear box have more oil in it?

[Aussie50]

@itscool1968 the engine gearbox was just over full when I got it.

unless you mean the lathe headstock?, its a little low (1/4" down on the sight glass) but I don;t have any of the right oil for it at the moment, if the level was below the sight glass it would be dangerous.

[itscool1968]

@Aussie50 yes i meant the lathe .

i thought most of the gears should be covered with oil while turning

[Aussie50]

@itscool1968 its all splash lube in these, fill it too high and it just comes out around the gear levers.

the gears at the back did appear a bit dry tho, I'll look into why that was.

[magnahelic1]

i have seen a block bored by mounting the block to the tool post and mounting the tool in the chuck

[Aussie50]

@magnahelic1 yeah, you can line bore things like that, bit of stuffing around to get it centered tho. good thing about the turret lathe is the 2 tee slots on the cross slide that a angle plate can be bolted to.

I guess I could chuck up a arbor that fit the existing cylinder, slide the block onto it and bring the angle plate up to it and bolt it in.

not really worth it for a disposable engine, but somthing rare and unique could be re-bored that way!

[trentontrading]

I wonder if you can put the cylinder in your lathe and bore it out somewhat like you did the head ?

[Aussie50]

@trentontrading since the cylinder dosn't come off the block it would be too hard to do it in a lathe, but clamping it to a angle plate on a mill and using a boring head would work fine.

only problem is finding a piston to suit (30 thou oversize or so) but that would solve the broken ring/score problem.

[GFVagent007]

Sweet! I took off just down to the circular area over the piston on a standard 11 cu. in. 4 hp on a push mower, by hand with a large file except that I filed a 10mm wide 15 degree wedge along the edge of the circle to help scavenging. The thing definitely gained a bit of power and held it's own against my prized 80's Toro with a OHV Suzki built motor. B&S pretty much did exactly that at the factory with basicly the same 11 cu. in. block and sold it as a 6.5 hp! Awesome stuff! Keep it up.

[Aussie50]

@GFVagent007 good work!, you can get a surprisingly flat surface by draw-filing, but not the same as milling or turning, only issue is the head gasket may not last as long if the surface is slightly uneven,

[DamnStraightM35A2]

@GFVagent007 Was it hard to keep the surface of the head flat using a file? Did the valves clear the head? And on a mower with a governor did it still run at about the same speed with no issues?

[GFVagent007]

@DamnStraightM35A2 It was a little tricky, but not impossible to get it close enough for the gasket to seal. The big thing is not to cut too fast and use some oil or the aluminum clogs the file and the packed metal gouges the surface. The governors reference crank speed either by an air vane or flyweights and is not affected. The valves did not interfere, but they can if you cut enough material off. The more material removed, the higher the power boost. Valve reliefs could be done on a mill

[Aussie50]

@randomenginestuff yeah its a job for carbide, I have drilled hardened steel before on a mill with carbide, its a slow process but it works!

I've seen a promo vid for new briggs engines with pressure lube, I guess they had too many larger I/C's blow up and finally got the message ;)

[douro20]

HMT- Would that be an Indian lathe?

[Aussie50]

@douro20 yeah thats the one!, very good machine dispite India's reputation for sand filled engines and so on.

[coolguy23448]

pretty sweet!

[Smoott69]

This is a very good video. Thanx for sharing it.

[coffeefish]

Happy Memorial Day Weekend.

Have a great one, have a safe one. (sweet lathe)

[Aussie50]

@randomenginestuff yeha the briggs aren't the best at big end lubrication and cross drilling the crank bearing journal solves that problem. I've never done it myself but my friend at the mower shop has done it and I hope will teach me how to do it :D

[30GB]

you should replace the ring and home the cylinder and it should work like new after the rings breaks in the groove

[coolbluelights]

hm, I wonder if you could rig it up to run on diesel, somehow put an injector in where the spark plug goes.. wonder if that can be done :P

[Aussie50]

@coolbluelights it would be fun to see what happens to it, but as randomenginestuff says it would take a huge amount of work and mods to make it work for the long term :(. the mechanical forces in a diesel engine are incredibly high compared to gas engines.

[Aussie50]

@randomenginestuff yeah it was just test, doing it to a good engine with new rings and cross drilled crank is the next plan!

[umajunkcollector]

I was wonderin IF the valves would have enuff clearance, and lookin good! A high octane B&S - HA!

[Aussie50]

@umajunkcollector I was playing it safe with this one, I will get some plastigauge when i do it on a good engine, stick it on the valve heads and see how much clearance is between the head and valve

[Bobdog6t9]

hmm wonder if ya can give it a cam regrind lol

[anthacdc]

nice, i did that on my gx 160

[mattyvt93]

Nice work mate! Been waiting for some one to do this :D Worked out well.

[Aussie50]

@mattyvt93 yeah, I can say it works but it idles high and is a bit rough, without a heavier flywheel it won't idle smooth, compression is higher than factory.

[mattyvt93]

@Aussie50 Yep, could see it idled a bit higher. Always good to experiment tho. :)