OMG,.. more issues,.. .21 engine problem

[anthony_marquart]

same set up, different day.

I have another NR 5p,.. Similar as the last.. rebuilt it along with the last one..

Now it WILL NOT RUN..

It seems that as soon as the engine fire at all it runs out of fuel.. fires for like 2 seconds and dies.. then I have to pull the plug,.. prime,.. do it again.. did it like 15x,.. no different.

I see the carb pulling fuel when the starter is on it..

One thing I noticed.. when I stop spinning the engine the fuel runs back from the carb real fast.. the fuel line empties back to the tank real quick,..

I am totally lost on this one.. never had this happen..

very frustrated and out of cash!

 

[Larry Roberts]

Sounds like fuel tank is closed off, no vent, check and see if your pressure line from exhaust is plugged in some way

 

[Brian Sorgente]

Heres some ideas.

Leak in your fuel system? Check/ change all your lines, check that your fuel filter isn't leaking or blocked and look for holes in your coupler. Check that your tank is holding pressure. Check that the pressure fitting in your pipe isn't blocked for some reason...

You could have a bad plug, I've had them start, then when you pull the ignitor off it dies over and over till you put a new plug in.

Your needle/ spray bar could be full of crap and need to be cleaned.

Brian

 

[Ken Hildreth]

One other trick to check out is the o ring seal on your carb neck.. My son's mono with a 5 port started leaking there and threw me for a bit.

Ken

 

[anthony_marquart]

I think it might be back pressure or carb leak... keep proposals coming.. going to fix this today if possible.

 

[Grimracer]

One of the great things about these silly little motors. if they get fuel and spark they are GOING to run.. maybe not well but those two must be met.

Grim

 

[henry velasco]

Never seen one of these engines inside but is it possable to to put the intake timing off 180 degrees?

 

[Mike Culhane]

Starter turning the right direction? Just something simple to check.

 

[brad nichols]

That's why I don't do outboards anymore because of the simple starter thing!!

Brad

 

[TimothyJones]

You said you rebuilt like the other one? and you wanted suggestions..

1-Look in the exhaust port is it aligned correctly,

2- Take some tubing hook to carb fitting,rotate wide open, should be free flowing. If you get light headed its either clogged or adjusted wrong.

3- Is a N/R carb? remote needle or not?

 

[anthony_marquart]

carb done by Glenn, Violet remote needle.. and the needle is old.. Sleeve has the alignment pin so it cannot go in wrong.. thanks guys,.. going to go through these items one by one today.

 

[steve wood]

but the piston can go in backwards

 

[anthony_marquart]

would the piston going in backward cause this? if I look into the exhaust port I should be able to tell easily right? Man,.. if the piston was in backward,.. it would make the exhaust open and then blow fuel right out the exhaust right? since the long side of piston covers the exhaust port on the up stroke.. Is that correct,.. man,.. that could be it too.. I've put the rod in backward but never the piston.. If that is correct,, it would make it seem like the engine as not drawing fuel as it never got into the cumbustion chamber.. right?

 

[Samuel Hagan JR]

Anthony I bought a brand new motor and the sleeve was 180 backwards from the factory. Just go through and recheck everything.

 

[Jeff Barnhart]

same set up, different day.

I have another NR 5p,.. Similar as the last.. rebuilt it along with the last one..

Now it WILL NOT RUN..

It seems that as soon as the engine fire at all it runs out of fuel.. fires for like 2 seconds and dies.. then I have to pull the plug,.. prime,.. do it again.. did it like 15x,.. no different.

I see the carb pulling fuel when the starter is on it..

One thing I noticed.. when I stop spinning the engine the fuel runs back from the carb real fast.. the fuel line empties back to the tank real quick,..

I am totally lost on this one.. never had this happen..

very frustrated and out of cash!

Tear it down and look at your piston/sleeve, head button, and check the bearings.
I've had three of my newer ones that were acting like that and they were all in very rough shape inside. I certainly share your frustration, nearly $1000 in NR engine parts that are bad. Not to mention, bad after only three days of easy running and very rich. Not the Nova Rossi quality I'm used too, hopefully they figure out the issue soon so I can start running thier normally excellent motors.

If you've got time, call me after you tear it down. I'd like to compare notes.

Thanks,

Jeff

 

[Tim_Duggan]

If your piston went in backward the skirt would hit the crank and break the piston.

Take the header off and set the motor to Top dead centre, look into the exhaust port and the piston skirt should completely block the whole port in the sleeve. If it's not you get sub piston induction, resulting in a motor that won't draw fuel well and is a PIA to start with no torque.

Also check the sleeve is seated properly and the ports line up with the case.

 

[anthony_marquart]

I checked all these items.. I can only assume that on this engine the seal between case and crank has gone bad.. It's really a shame as this motor has a relatively new P/L, basically new head button with a reduced bowl volume, carb mod,.. newer rod,.. it was another one that was running a bit poorly so I changed the bearings.. only think I can figure at this point is now that the crank is well centered in the case the seal is no longer good..

This motor used to run very well. I have a lot of good parts.. Not sure what to do,.. I guess i should get another and with all these parts Ill have good stash...

A lesson to all.. change your bearings.. don't wait till you have an issue.. it's too late..

 

[shoboat]

Tony,

Just buy a new case from Glenn.

You should be good to go then.

Enjoy Testing,

Mark Sholund

 

[Brian Sorgente]

Tony,

You could be right but I'm doubtful that's the problem. It would have to be pretty bad for it to not run at all. Pull the back plate and carb off the motor, clean the carb hole on the case with a little alcohol to get the oil off and give that thing mouth to mouth...lol.. What I mean is blow into the case through the carb hole and see if its leaking when the crank window is closed.

Honestly, I would take it all apart, check everything including every o-ring and put it back together, its bound to be something silly. Even a motor in rough shape should run and it sounds like this is pretty new... When was the last time you charged your glow starter?

Brian

 

[anthony_marquart]

That's funny man,.. the glow starter was so hot the top of the engine was getting warm from it being on there.. I hope your right.. I don't want to part this thing out..

Maybe I take it out and send to someone with more experience than me..