Thanks for the video my zero turn runs like a top now 👍

Thank you for this video! I always wondered how to turn the crankshaft without running into all the interlocks for the blade (power take off).

Thanks brother! Quick and easy....Great video...

You just adjusted both valves at the same time at TDC on compression stroke I believe ! Both valves should be fully closed at that point !

Thanks for the info. Going to do this for the first time in my life.

Thanks for posting this. Cured my hard to start mower!

@jamiehalifax4954

3 жыл бұрын

Was your motor hard to start cause it didn't turn over. .or turned over but wouldn't fire?

@glennmilles341

3 жыл бұрын

It wouldn't crank when the flywheel/perforated wheel was in a certain position. If I moved it by hand, it would start. After I adjusted the vslves. It starts without issues.

@jamiehalifax4954

3 жыл бұрын

@@glennmilles341 ok,good to hear..I'm having the same troubles. Going to check valves tomorrow. 23hp vanguard in an argo 6x6

I got confused. You said .004” on the intake, and .006” on the exhaust. Then you set both at .006”

great video... how did I never learn about this until today??? BTW - I appreciate all the background noise and times when you blocked the camera... that stuff happens to me all the time

Thanks for the video very well explained !

nice tutorial

The valve lash on my 20hp on one bank got so bad both pushrods came out of their seats and got bent. No damage was done to the head thank god. I had to bend the pushrods back into shape just to get by until I can get new rods & the exhaust valve guide. It backed out and I think caused the intake pushrod to jump out of the rocker. I'm just limping it along, adjusting that cylinder every time before I mow before I get it repaired. It's pretty costly to have a shop do it as I'm an automotive mechanic and dont have the tools to do it myself. I can rent what I need perhaps but i dont want the headache. Rather just bring the head to a shop.

Failed to mention, four strokes have 2 TDC , compression and exhaust. Get this wrong you got a problem. Adjust valves on compression, when rockers will be a little loose,

@oldschooldude8370

Жыл бұрын

1/4" past TDC as well. You can hear/feel this. Correction. You hear the lobe just before TDC then feel it 1/4" past TDC. Compression release is the theory behind this. I've always done it.

You need to turn the motor just over TDC to get past the compression release, if you turn it over while using the feeler gauges you will feel the right spot. Thanks for the video.

@Jack-ml2ux

2 жыл бұрын

Biggs & Stratton recommends a 1/4 inch piston travel

@oldschooldude8370

Жыл бұрын

I feel its trivial but I've always abided.

Very good video! I/we just discovered out of the blue my g/f's Craftsman with a V twin that will only crank up to compression and then stops turning. Brand new StrongBox battery. Cables and connections pristine. Got to be those clearances.

@jamiehalifax4954

3 жыл бұрын

I could be compression relief went kaput like they are famous for. And that's a complete engine teardown

@wandayoung1298

Жыл бұрын

Thanks

@wandayoung1298

Жыл бұрын

@@jamiehalifax4954 Thanks

@wfdix1

Жыл бұрын

Or the compression release lobe on the camshaft.

@Brian-my3gd

Ай бұрын

Or the valve guide backed itself out of the head and it bent your pushrod.

MRI DYI do you have a video on valve service/ adjust on the Briggs flat head Quantam L heads?

If you rotate the motor CCW, you defeat the compression release and when you get to TDC back it off 1/4 inch. Always do the intake first

@mkshffr4936

2 жыл бұрын

I noticed that the 16HP Vanguard service manual said to adjust at 1/4 past TDC. Does that mean that the piston travel (i.e. piston drops 1/4")?

@davidvines6498

2 жыл бұрын

@@mkshffr4936 you just go to TDC and then 1/4 below TDC

If you’re lucky, a valve adjustment is all you need. My B&S camshaft with compression release broke, making it very tough to start.

@chrispederson4157

14 күн бұрын

Valve adjustment fixed mine.

Thanks for the instructions, that is a fuel pump not oil pump. The hose you disconnected is a breather hose.

@jamesbrannon9594

Жыл бұрын

No it’s not a breather hose it’s a vacuum hose to operate the Fuel pump

I liked the video. You said you like intake at .004, then you adjust to .006 in the video.

@tihspidtherekciltilc5469

2 жыл бұрын

Maybe rewatch as he explains that.

Where can I get a fuel pump exactly like that one for cheap

What you are working on would help.

Is there a way to provide a picture of this decompression mech? I took a couple of pics and can share these; not sure how here.

Briggs actually says that piston should continue past tdc down 1/4 inch .this ensures intake is past the compression release position.

@GingerAvenger

5 жыл бұрын

Correct, 1/4" past to dead center on the compression stroke.

@alan93

3 жыл бұрын

It would seem there is no way to determine this for a novice.

@lundyracing

3 жыл бұрын

@@alan93 sure there is, both valves should have a gap on that stroke, hence them not being open and allowing the combustion chamber to be sealed to compress gasses. If either valve is open while at tdc you need to rotate the motor to the next stroke.

@marksalamack6133

3 жыл бұрын

@@lundyracing That is a concise, yet thorough explanation...thank you

@lundyracing

3 жыл бұрын

@@marksalamack6133 it wasn't meant for people that don't understand how engines work, there is a fair bit of people that should stay out of an engine. Myself may be included in that category lol

The decompression mechanism failure is common on the single cylinder engine, but the twins need valve adjustment. (so I am told)

@SmallEngineDIY

Жыл бұрын

The valve adjustments are often overlooked.

How to you know which valve is intake or exhaust.when you were showing how to find tdc on of the rockers was still tight and about to open so you turned it again to tdc till both rockers had slack. I'm guessing the valve that opened just past tdc was exhaust..is this right . I'm doing it tomorrow on a 23hp vaguard in my argo.. never did valves before.2 stroker here . Looks super easy though. But I'm hoping it's why it wont turn over at startup. To much compression.and I'm hoping it's just adjustment and not a blown up camshaft compression relief doohickey !!

@jamesweigand7524

2 жыл бұрын

exhaust is nearest where exhaust pipe comes out of head. intake is near carb.

I'm trying to figure out how you did a piston ring replacement job and put the engine back together WITHOUT adjusting the valves and it still ran!!! wtf?

@redneckpackrat128

Жыл бұрын

Real simple. I've done it too. When you're putting the heads back on and reassembling the valve parts, you start it out at 'yeah, that kinda sorta feels right enough to hold stuff together while I finish the rest of the reassembly' with the intent to go back later after rotating the engine a few times revisiting that with feeler gauges. Sometimes it happens.

the intake is top.. right ?! He pointed to bottom one and said "intake"

Is is possible to turn the output pulley instead of removing the top cover .

@haydentaylor5387

2 ай бұрын

Yeah

Is there going to be oil in that area

@SmallEngineDIY

3 жыл бұрын

Usually is

So the valves became too tight? I would expect them to get loose over time. Mine is running fine for about 30 minutes then it immediately becomes rough with a loss of power. Would this be more likely a valve adjustment issue or sticky valve or bent rods?

@lundyracing

3 жыл бұрын

Nope, valve clearance always gets tighter over time. Has to do with the valves hitting the seat and them getting pushed out over time.

@alan933

3 жыл бұрын

@@lundyracing I found out mine had a left side coil go bad. Repaired. Runs great now.

@jamiehalifax4954

3 жыл бұрын

Doesnt carbon build up between the valveseat and valve causing it to become farther from the rocker, thus causing a larger gap over time? Esp on the exhaust valve??

@jamesweigand7524

2 жыл бұрын

They wear looser but valves sometimes sink in cylinder head making them tighter. Then they could have been adjusted wrong.I never knew what to expect.

@danhigbee2283

3 ай бұрын

Valves will tighten up as the metal gets hot and expands losing the clearance

👍

If the valves are tight TDC, doesnt that indicate you are TDC on the exhaust stroke? I was under the impression on the compression stroke at TDC the valves are not tight and adjustment should be made on compression stroke.

@dannycobb9253

3 жыл бұрын

Correct

@jamesweigand7524

2 жыл бұрын

TDC compression. some make mistake of TDC exhaust.

@andrewderocle

2 ай бұрын

That's why you finger cap the spark plug hole, turn the motor till compression blows your finger off the hole then use screwdriver to achieve TDC.

@hotwheelindeals6805

15 күн бұрын

Yes, he is at the wrong TDC in this video....valves are tight when they both should have some slack. So he's actually adjusting the rockers to DOUBLE the gap. Sure hope he didn't try to start the engine afterwards !

Opened the engine found the cam decompression valve failed. New cam on order....and it was not a V twin.. it was a single cyl. Housing cover is deceptive.

@ya472

Жыл бұрын

The decompression mechanism failure is common on the single cylinder engine, but the twins need valve adjustment. (so I am told)

set them both on 4 thousands

@jamesweigand7524

2 жыл бұрын

is that what manual says ?

@Jack-ml2ux

2 жыл бұрын

@@jamesweigand7524 .004-.006

Oil pump???? petrol/gas pump..

It's a fuel pump not a oil pump

00:57 the oil pump... Uh, yeah....the oil pump that sucks gas into the carburetor.

@tihspidtherekciltilc5469

2 жыл бұрын

Obviously a misspeak. Feel special?

I appreciate you being very thorough and finding TDC(top dead center) and all that but in reality all you have to do is: For the exhaust valve(the bottom one) rotate the crank either by hand or with the starter until the top valve is compressed. And when you want to adjust the intake(top) valve, rotate the crank until the bottom valve in compressed. No need to fuss with TDC(top dead center) or anything. My engine was extremely hard starting when I tried this and I found that I could easily slide a .010 shim between the rod and rocker when the tolerance was between .004 and 006. I adjusted until I couldn't fit an .007. My mower now cranks and runs like a new engine. If you want a quick but useful video which is what I followed, watch this one: kzread.info/dash/bejne/h2dkzMdxg728YLw.html

@ColonelBumButt

5 жыл бұрын

Also, I didn't find anything to be 13mm. I found that a 1/2 in wrench fit the lock nut perfectly. I don't think these are in metric.

@archiemccain4923

3 жыл бұрын

@@ColonelBumButt Adjusted my Briggs & Stratton 22hp twin intek today. Definitely took a 13mm for the lock nut. T-40 for the torx adjuster.

@Jack-ml2ux

2 жыл бұрын

@@archiemccain4923 some use torx and some use allen adjusters

@redneckpackrat128

Жыл бұрын

@@ColonelBumButt Some of these Briggs V-Twins are really funky half-metric, half-imperial. One I'm working on now has 3/8" heads on the valve covers and 13mm jam nuts. 10mm holding intake in place and 3/8" bolts holding down the top cover. I guess there was a switchover of fastener sizes that kinda rippled through the engine factory or something....LOL

@chrispederson4157

14 күн бұрын

Agree about adjusting valves. Way easier way to adjust valves. Mine were .15 valves has never been checked 680 hours on engine.