Briggs 4 stroke trimmer engine!!!
 

Hey, take a look at this one. It looks like there will be several 4 strokes to play with in the future. Maybe this one will be affordable.



http://www.briggsandstratton.com/Mai...and=fource&l=0

POWER

Briggs 4 stroke trimmer engine!!!
 

The engine(s) do not use overhead valves. Power will be down because of the lower compression ratio associated with this type of design.

Thanks for the tip. It may work great for its intended use.

Briggs 4 stroke trimmer engine!!!
 

Briggs 'L' head would be quite a bit shorter than a OHV probably lighter too without all the valve train paraphin. 'Goodies'. Head would be easy to shave too. Have to look into that!!

Briggs 4 stroke trimmer engine!!!
 

What exectly does "side valve" mean anyway. I thought you either had a flat head with valves in the block next to the cylider bore or you had OHV. Are there any 'sploded view diagrams too look at?

Briggs 4 stroke trimmer engine!!!
 

Never heard the term side valve. It probably is just a flat head like most of the Briggs lower end engines. Valves in the block next to the piston.

Vince

Briggs 4 stroke trimmer engine!!!
 

There was a Willys Jeep engine back in the 50'swith the valves in the side of the block into the cyl. Didn't work very well so they weren't around long. L head and flat head are the same thing. Same as your older lawn mowers, simple and reliable.

Briggs 4 stroke trimmer engine!!!
 

The Jeep was an F head, intake in the head and exhaust in the block....Or the other way around:D

Briggs 4 stroke trimmer engine!!!
 

RCIGN1:
Thats the one. My mistake. Memory going to h###. Worked in an engine rebuilding shop back then.

RE: Briggs 4 stroke trimmer engine!!!
 

wernt around long? hah flatheads were the standard design from the dawn of automobiles until the mid 50's. Jeep actually used them for almost 15 years.

RE: Briggs 4 stroke trimmer engine!!!
 

she's ported and relieved, and she's stroked and bored, she'll do a hundred and forty in the top end floored.:D

edit- I couldn't get the link to the engine.

RE: Briggs 4 stroke trimmer engine!!!
 

Didn't Ford make the willys Jeep too?

RE: Briggs 4 stroke trimmer engine!!!
 

That Willys was an F head, not a flat head.Hah:D

RE: Briggs 4 stroke trimmer engine!!!
 

Hah, American Bantam made the prototype, Ford and Willys made the Jeeps when American Bantam couldn't make them in the volume the army wanted...Willys made most...
The F head was made for a few years, I don't think the Jeep had any, they were in the pickups and station wagons...Didn't last very long....

RE: Briggs 4 stroke trimmer engine!!!
 

I had a 1960 Willis Jeep that had the "F" head. Remember it well. Burned an exhaust valve which was in the block. The intakes were in the head. Could have been from poor maintenance. Never adjusted the valves. Just changed oil and filters and drove it quail hunting. The rest of the time it sat under the barn. Rugged little machine. I remember the old WW2 Jeeps having a"L" head with all the valves in the block.

RE: Briggs 4 stroke trimmer engine!!!
 

I got my Briggs & Stratton 34cc running yesterday. It hand started easier than I thought it would and ran real nice. However, as noted in a couple other threads, the top end breaks up and quits. I don't know if it's fuel starvation or it's just not broken in. The engine seems like it wants to come on strong when you open it up, but it's being held back. Otherwise it runs real nice. I'm not done cutting off excess metal yet, but I was eager to get it on a test stand.

I'm wondering if there are any carbs with a high end adjustment that would fit on this.

Jim

RE: Briggs 4 stroke trimmer engine!!!
 

Can't remember which carb is on it, but they are calibrated with the air filter on. Without, it will run to lean. May have to drill out the high speed 1 or 2 thou. at a timeif it's a fixed jet. Had to do that before on a few engines.

RE: Briggs 4 stroke trimmer engine!!!
 

Thanks. It makes sense that it would run lean without the air cleaner. I heard about drilling it out, but how do you get at the jet? There's a plastic tube that slides over the needle when the barrel is in place. Do you remove the tube to get at the jet?

Jim

RE: Briggs 4 stroke trimmer engine!!!
 

Used to run a small motor shop but can't remember the carb. Do you have a motor model number and i'll see what I can find.?

RE: Briggs 4 stroke trimmer engine!!!
 

And it was around a very very long time.

RE: Briggs 4 stroke trimmer engine!!!
 

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Some American Motors six cylinder engines used them into the Sixties. Ford used them until the 54 model year.

I drove a 53 Ford coupe with a flathead V-8 engine for the remainder of my high years. Sweet engine. On really cold winter mornings, often my old Ford was the only one that started on the whole street. <G>

Ed Cregger

RE: Briggs 4 stroke trimmer engine!!!
 

Yep! Quieter than the motors they make now. Had a 51 Ford convertible. If you lifted the hood, all you could hear was the generator brushes buzzing. Wish I had it now. No hydraulic lifters either, and not adjustable. You adjusted them when you built the engine by grinding the end of the valve so you had one shot at getting it right. Much like the push lawn mowers with the L head engines used up until recently. Worked for an engine rebuilder back then. Where I learned my trade.:D

RE: Briggs 4 stroke trimmer engine!!!
 

Sorry, I don't have a part number, but I'll try to find it. It's from the Sears weedwhacker, 34cc.

There's a small engine shop down the road. I might take it down there and see what they think too.

RE: Briggs 4 stroke trimmer engine!!!
 

Are there any #s on the motor itself, usually stamped in the blower housing if you still have it.?

RE: Briggs 4 stroke trimmer engine!!!
 

On the plastic housing it has model #21032. I couldn't find anything stamped on the motor itself.

Jim

RE: Briggs 4 stroke trimmer engine!!!
 

Hey, there are a couple other threads worth reading regarding the B&S engine. Lots of talk about jets, props, and the whole shebang. this one is most recent. [X(]

http://www.rcuniverse.com/forum/m_46...tm.htm#4658598

FR