Starting Problems, Please Help!!!!

[MONTFJ60]

I've been posting a few Q's lately...I'm having troubly starting my O.S. RZV01B...Yesterday i was able to get it started, i let it idle for about a half tank and it died...that was it for yesterday, would not start again...Today i fired it up...it started and idled for about 5 secs then quit...Now i can't even get the engine to turn over, the fly wheel spins but the engine doesn't turn over and certainly doesn't start...I have all the needles set at factory rec. specs for break in...Why won't it turn over? Is it flooded? I took out the glow plug and closed the high needle and it shot fuel out the top of the head...still nothing? I checked the glow plug and it glows... It's getting fuel as far as i can tell, has spark or glow, and air...what's my problem?

[Scummer]

You have your throttle 2mm open?
Most of the time I have to open my throttle even 1/4 to get my engine to start. And too much fuel is of course not good either.
I prime my fuel line and then a bit, just to get a little bit fuel inside the carb. Pretty much starts right away everytime.

Thomas

[MONTFJ60]

yep, checked that...just can't figure out why the fly wheel spins but the engine won't turn over...

[robriguez]

OK....lets start from the basics....

STEP 1
-Is this a Brand new engine?
-If so it should have come with a manual of some sort that will tell you where your needles should be. I am no expert but on the engines Ive worked on, the LSN should be set flush and the HSN should be about 2-3 turns out.
-With the throttle closed, take the air filter out and the gap between the carb restrictor and the housing should be about 1mm to 2mm

STEP 2
-Take the glow plug out and turn the flywheel by hand slowly....you should see the piston moving up and down inside the engine. If this is happening then we can assume you didint break anything inside.

STEP3
-With the glow plug still out, put a rag, cloth, or just plain old paper towel over the head and turn the car upside down and turn the flywheel over a few times....if you have a pull start give it a few short pulls. If you have a starterbox, make sure the battery has some juice and make it spin. This should help get any extra fuel out of the engine if it is flooded.

STEP4
-Put the glow plug back in. Try to turn the flywheel. It should turn easy at first then get real hard. This proves that you have some compression. How much...dont know....but if you dont have compression you will not start the engine.

STEP5
If you have some good hand eye coordination you can do this yourself but you may need a friend at first.....First try this without priming the engine....
-Turn on all your electrics, try to start the gnein with the glow ignighter attached, and while your trying to start the engine slightly open the throttle. Some say to just blip it but I keep it open almost to 1/4.

If this doesnt start the engine, prime the engine and try the last step again.

As long as you have 4 things your engine (all engines) will run.

-Fuel
-Air
-Compression
-Spark (glow plug nice and glowing red)

Try all that, one step at a time. Take your time. Try not to get fustrated. And let us know how things turn out. The OS engines are known to be very good reliable engines so its just a matter of time before you find the right combination of settings to get your engine running right.

[MONTFJ60]

I did what you said...I took out the glow plug and turned the flywheel, piston moved up and down. I then put the glow plug back in and tried to turn the flywheel by hand, turned a few times, was difficult, then the flywheel just started spinning freely...the piston wasn't moving, just the flywheel...So, i took the engine out, thinking maybe i somehow put the flywheel/clutch assembly together incorrectly...The nut holding the flywheel in place was rather loose...I removed the flywheel assembly entirely and tried just turning the crank shaft i guess it is called...It did exactly what it was supposed to do...was difficult to turn, could feel the compression...so i assume the flywheel was just loose...Does that sound like a cause of my problem...Haven't tried starting again as it is late, but whatcha think?

oh, and it is a new engine...bought new about a year ago that is, but i just took it out of the box last weekend.

[wdavidhicks]

You haven't mentioned replacing the glow plug...

They can glow and still be fouled.

[RobH]

MONTFJ60, sorry to hear your having some troubles with it.

Maybe I'm reading this wrong, but you said the flywheel spins but the engine wont turn over? if that means the flywheel is spinning and the piston isn't moving up and down, they you have a bit of a problem. if that means the piston is moving up and down and it's not barking at all, see the above posts about glow plugs, etc.

If the flywheel is spinning on the shaft and the piston isn't moving, it's possible the clutch nut case loose and the flywheel move independantly of the crankshaft. You'll have to take the engine off, remove the clutch bell and the clutch to tighten it back up.

Good Luck.

-Rob

[MONTFJ60]

I believe the flywheel was simply loose b/c like i said i could turn the crankshaft and the piston moved up and down but the flywheel was just spinning...so i removed the clutch and flywheel and tightened the nut holding on the flywheel...can i or should i use thread lock on this nut...keep it from coming loose???

When i ignite the glow plug it makes a sizzle sound and glows bright red...assume it's working...

One more Question...How exactly does one prime an engine, remove the tube from the muffler and blow??????

Thanks so much for all the help

[Scummer]

I use my fuel ball to prime the engine. Before i had that, i just used a foot long fuel hose and connected it to the fuel tank and blew some air into it.
Now, be adviced, i don't pressurize my tank, my engine strictly sucks the fuel from the tank, since my muffler doesn't have an outlet to connect a pressurizing hose to the fuel tank.
So i don't know if you have enough time to swap the hose back to the pressurized line from the muffler without stalling the engine.

But a loose flywheel is no good. Flywheel needs to be connected to the crankshaft solid.

Thomas

[mcvickj]

Yup it sounds like your glow plug is OK.

I am pretty sure you can use some threadlocker on the clutch nut.

I prime my engine by holding my finger over the exhaust tip and pulling a few times.

[RobH]

I put loctite on my clutch nuts. Don't buy the red loctite because that's perminant. I've confused some local people when I said I used "loctite". They are like "NO don't do that!" blue loctite, not red.

I prime my engine bu putting my finger over the tip of the exhaust pipe and then you turn it over until the fuel reached the carb. then you give it a few extra turns to pump the fuel into the engine. (helps to have clear gas tubing for this reason)

another thing that can help start it up is to give it a little bit of gas when you're starting it. you can do with with the throttle trim. trim the throttle just enough that you see the carb move a little. fire it up and then when it's warm you should be able to take the trim off.

[lillightingboy21]

i couldnt get my os engine started before and it was from a weak glow igniter i thought it was fine but it wasnt replace glow plug and get new glowstarter if that doesnt take it to your lhs and see it they can get it started also check compression

[lillightingboy21]

did u get that bad boy started yet?:hamster: