YM 1700 poor starting

[nickfish]

Hi I have a YM 1700 which was a great starter when I bought it last year. Would fire up at the slightest turn. I left it standing and the battery went flat. Then i found the starter was burned out. I replaced the starter and now it spins over fine, it coughs black smoke as it tries to fire but it won't start (unless I hook it up to my truck with jump cables to make it really spin(.

I've tried bleeding it. Fitted a new filter. Lots of fuel comes out from the filter belled screw and pump bleed screw but not much from the injectors (should I take the bolt right out at the injector?)

Does anyone have any thoughts about how to make it start easily again. It has no heater plugs - just relies on compression and fuel. The diesel in the tank is from last year would that be a problem. The filter was pretty yucky when I changed it.

any help gratefully received

cheers

nick

 

[winston1]

Air filter good and clean?

Does your 1700 have compression release?

What ambient temperatures are you seeing there?

 

[nickfish]

filter was new when I bought it.
it does have compression lever which I use to get it spinning over fast then drop it to engage engine it puffs smoke but doesn't catch unless I use another battery and let it really spin.
but that's impractical out in the woods/field.
it's 10 degrees C now, 50 degrees f so it should be okl

thanks for your interest

 

[winston1]

With the added information and knowing it was cranking good a year ago would indicate nothing wrong with the compression. I would lean toward contaminated fuel being your problem.

 

[nickfish]

when you say contaminated fuel does that mean by water - or just old?
and would that make it hard to star? Like I said it will go eventually with an extra battery boost and runs fine when its going it's just the starting that's got so hard.
would you suggest I drain out all the fuel and start again and then bleed the system through again including the nuts at the injectors

cheers

Nick

 

[winston1]

I doubt year old diesel by itself would be the problem. You stated the filter was yucky. That is a good sign of contamination. Always best to look at the easy fix items first. Before I started looking at injectors or anything mechanical I would just want to know I had a good clean fuel supply. If there is doubt about the fuel condition what about pulling the line to the filter, drain it in a clean container, take a flashlight peek in the tank and go from there.

Does the tractor start easy once warmed up?

 

[nickfish]

again thanks for your help.

once she's warm she starts fine. I took the pipe off the filter housing when I changed the filter and did as you suggested and ran some fuel off. It looked fine to me. I was going to drain the whole tank but thought better of it because the fuels was so clear.

i guess it does make sense to start afresh. when i did bleed it before I didn't undone the collar nuts on the injectors but instead loosened the bolt on top. I gather through looking at something on youtube i should have undone the collars, is that correct? both together. would it be worth trying another bleed first?

 

[winston1]

If it is running fine, cranking fine after warm up, I would think the system is well bled and fuel must be ok.

Whole thing is mysterious to me. Hard to understand it cranking fine a year ago and now it won't. Especially after cranking several times and running.

Let's hope a sure nuff guru jumps in here and tells us what is wrong.

 

[Ginormous]

again thanks for your help.

once she's warm she starts fine. I took the pipe off the filter housing when I changed the filter and did as you suggested and ran some fuel off. It looked fine to me. I was going to drain the whole tank but thought better of it because the fuels was so clear.

i guess it does make sense to start afresh. when i did bleed it before I didn't undone the collar nuts on the injectors but instead loosened the bolt on top. I gather through looking at something on youtube i should have undone the collars, is that correct? both together. would it be worth trying another bleed first?

Nick,

I also bought a YM1700 last year; sounds just like yours. I was also having some starting issues this year. I worked on it, and ended up fixing 3 things that I think were issues:

1) I cleaned electrical connections of corrosion (like the ground from the battery to the frame.) I think this was limiting the power to the starter.

2) My starter was on its last legs. I replaced it.

3) I had a broken bleed screw at the fuel line "banjo" fitting. I think that was slowly letting air into the fuel line. If I could get it started, it would run fine and would re-start unless I let it sit for a while and gave it a chance to let air in.

Last year I also replaced a piece of fuel line that had dry rotted.

If I were you, I would try #1 as it's easy. My next guess would probably be a slow fuel line leak that's letting in a little air...

Cheers

 

[nickfish]

when i tried to rebleed it and took the collar nuts off the right hand side never really even dripped. left hand was ok.

might try starting to bleed back from the start again

also the new starter motor is getting very hot.

got me stumped.
n