Jinma 284 starts really hard

lastcowboy32

Well-known Member
I have the Y385 engine.

It just acts as if the starter doesn't have enough torque.

My battery is good.

I cleaned and tightened all of the connections.

It turns over, but it is really slow...and then...if you keep cranking...it suddenly starts to really turn fast and...bam...tractor is started. Or maybe not. Sometimes it just keeps groaning like the battery is half dead and never gets to really cranking the engine. Engine temperature and ambient temperature matter a little bit. It usually seems worse when it's cold (but I heat the engine). It's usually better when it's warm outside, but it also is bad when the engine is hot. Sometimes I have to let it sit and cool for a while before it will start again.

It just never seems to just turn over the way it should.

It's just so unpredictable. It seems like the starter might have a loose connection internally? Or I've read that one set of windings can go on a starter?

The cable from the battery to the starter is also pretty long. I'm wondering if anyone has ever replaced the cable from the factory with higher gauge cable with any luck?

Is there a heavier duty starter that I could look into?

I'm just wondering if anybody has had a similar issue and what they've done to fix it.
 
Check your operators manual. I think most of those tractors built in China have decompression leavers for starting.
 
(quoted from post at 11:07:16 11/03/15) Check your operators manual. I think most of those tractors built in China have decompression leavers for starting.

Already use that. It seems to not matter what position it's in. The manual says that the decompression lever should only be needed in very cold circumstances. I use it all of the time, and it really doesn't seem to help.
 
(quoted from post at 12:29:36 11/03/15) It's not working. Probably not hooked up.

It would be difficult to see if it's actually working inside the engine, but it is connected, and I feel resistance as I turn it and what appears to be a spot where it's engaged.

The glow plugs are also on the fritz, but that shouldn't affect the rate of turnover.

The starter terminals get hot after about 10 seconds of cranking. Hot enough for a little wisp of smoke to rise from the nylon on the locknut that connects the battery cable to the starter (Hence my dis-assembly, cleaning and tightening of all terminals)

The problem also occurs when the engine is very warm; at which point it shouldn't need glow plugs, decompression levers, etc.

I know a specialty shop nearby that works on starters. I'm thinking that I should remove the starter and take it there for testing.

There may be multiple issues here, but the starter should definitely turn the engine faster than it does and more consistently than it does.
 
Just to close the door on this issue:

I took the starter to a specialty shop near me.

He tested the unit and found that at least one or more of the brushes are bad.

May also need bearings/bushings.

So, it was turning. It just didn't have the torque that it should.

Good news is that I know the problem.

Bad news is that he doesn't have parts for this particular starter; so I have to bite the bullet for a new one.

I'm going to get the old one back, though and maybe see if I can make a little project out of it. Would be nice to have a spare; since these starters may get rare.
 

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