2 cylinder Kubota

[theski]

Hello all
This is my first post ....my two cylinder brand new motor is hard starting....when it's 70° it starts ....glow plugs have power....fuel looks good ....at times of no start I give it a puff of starting fluid and it starts right up ...I use it to run a generator like an APU on my tractor trailer
Any advice appreciated

 

[North Idaho Wolfman]

I give it a puff of starting fluid and it starts right up

I will 99% guarantee you will need to have the engine rebuilt.
These engine you can NEVER use starting fluid.
It bends the rods, it brakes pistons, it damages a whole host of things.

You will need to start by doing a compression test on it to find out the initial state of it.

 

[theski]

I will 99% guarantee you will need to have the engine rebuilt.
These engine you can NEVER use starting fluid.
It bends the rods, it brakes pistons, it damages a whole host of things.

You will need to start by doing a compression test on it to find out the initial state of it.

Darn ....it's brand new....now I just give it a little puff ....but once it starts it is good ...it has been like this since new first time in temps below like 60 ° ....but I'll do the tests you mentioned for sure ...thank you for replying

 

[theski]

Darn ....it's brand new....now I just give it a little puff ....but once it starts it is good ...it has been like this since new first time in temps below like 60 ° ....but I'll do the tests you mentioned for sure ...thank you for replying

It is now 6 months old I used it all winter even in 10 below zero temps ....the starter is a little bit slow ( original)

 

[North Idaho Wolfman]

If the compression is good then it's a glow plug issue.
That's an easy thing to fix and remedy.
Glow plugs on these engines can take 10 to 30 seconds to heat up and they also heat while they are cranking.
And yes it's also possible that it's got a starter issue and it just isn't spinning fast enough.

 

[theski]

If the compression is good then it's a glow plug issue.
That's an easy thing to fix and remedy.
Glow plugs on these engines can take 10 to 30 seconds to heat up and they also heat while they are cranking.
And yes it's also possible that it's got a starter issue and it just isn't spinning fast enough.

Now when I put a test light on the glow plugs it lights up nice ...I hope the gloves are new on a new motor but what ya think ?
Thanks in advance

 

[PoTreeBoy]

Now when I put a test light on the glow plugs it lights up nice ...I hope the gloves are new on a new motor but what ya think ?
Thanks in advance

That shows you have power to the plugs, but not that the plugs are heating. If you have an ohmmeter, disconnect the wires and measure resistance from the top of each glowplug to ground. Should be around 1 ohm.