hard starting 743

[deb1]

I am looking at a 743 and even in the summer months it requires the glow plugs to be cycled for about 30 seconds for the engine to start. Is this normal? thanks, don

 

[Bobcatdan]

They can be a little stubborn starting, but I'd bet compression is starting to get low. I've seen some I had to glow 3 minutes on a 90° day to get started.

 

[deb1]

They can be a little stubborn starting, but I'd bet compression is starting to get low. I've seen some I had to glow 3 minutes on a 90° day to get started.

thanks, that is what i was thinking too. Is the problem usually in the rings or in the head needing to be rebuilt? I assume it just needs a complete overhaul.

 

[Bobcatdan]

thanks, that is what i was thinking too. Is the problem usually in the rings or in the head needing to be rebuilt? I assume it just needs a complete overhaul.

Number 2 and 3 cylinders like wear due to oil starvation. On start up, these cylinders don't get propper oil flow right away. This isn't a problem if you let the engine run at idle for a moment to warm up. Then you have the guys who start them with the throttle full blow and have the stick fully depressed before they have their hand off the key. Then they bitch a Kubota that's suppose to run for ever is junk at 3000 hrs.

 

[Tazza]

Number 2 and 3 cylinders like wear due to oil starvation. On start up, these cylinders don't get propper oil flow right away. This isn't a problem if you let the engine run at idle for a moment to warm up. Then you have the guys who start them with the throttle full blow and have the stick fully depressed before they have their hand off the key. Then they bitch a Kubota that's suppose to run for ever is junk at 3000 hrs.

It's the nature of the engine
I rebuilt a V1702, it still took a good glow to get it to wake up. Even after it was warm, it would still like a little glow to fire up.

 

[billrbg]

It's the nature of the engine
I rebuilt a V1702, it still took a good glow to get it to wake up. Even after it was warm, it would still like a little glow to fire up.

Hmm, I hesitate to disagree with Tazza, but... my tired old 743 needs little-to-no glow for a cold start in 60+F weather; and, once it is warmed up, no glow even in chilly weather. If I let it sit for a couple of hours after warming up, it may take about 5 secs. of glow, depending on the weather.

 

[Tazza]

Hmm, I hesitate to disagree with Tazza, but... my tired old 743 needs little-to-no glow for a cold start in 60+F weather; and, once it is warmed up, no glow even in chilly weather. If I let it sit for a couple of hours after warming up, it may take about 5 secs. of glow, depending on the weather.

You are right, some will work better than others
It really does depend on how well the engine wore in and if the builder (me) stuffed something up making it more cold blooded.
It could be that mine had not yet worn in to give the compression it should have had. Glad your engine is better than mine was.
I do love the newer V2203DI that my S150 has, starts first time, even without a glow.