Yanmar ym146

[YannyMan]

Glad to hear she's back up and running. Neither one of mine shakes at all at idle. They're pretty much smooth throughout. Are you engine mounts in good shape?

According to my manuals, slow idle is 1300 rpm, "working speed range" 2100-2600 rpm. Since they didn't have tachometers, who knows? Maybe post a video and I can compare?

You can always check the linkage at the pump for full throttle and make sure the cable is adjusted to give that much pull at WOT.

 

[284 International]

Those sure are awesome little mowing tractors! I want one!

Sacsr, does it run like it did before you tore the engine down?

Try slightly loosening the fuel lines, one at a time, at the injectors and see if the vibration is coming a miss induced by fueling issues. It will be quicker and easier than a compression test.

Is it smoking any? If so, what color?

Did you make sure to set the valve clearances correctly? The poor performance may be due to a valve hanging open, or not opening fully.

Or just go try it out and see if it mows well, and go from there.

I want to see more pictures of these things. :thumbsup:

 

[sacsr]

Here is a link to the tractor running....ran out of memory so will try again later this evening.


YouTube - Yanmar 146

 

[YannyMan]

Sounds about right at WOT. Might be a little low at idle. I'll have to see tonight how much mine shakes, I don't think its that much.

These things do have a history of breaking motor mounts. They actually have a HD mount for those tractors as a "fix" for the originals. Might wanna check those out.

 

[Neat 1500]

yeah mine shakes a bit at idle but maybe not that much. my engine mounts are very jelly like so that i think is why. one day when i am bored i might try to make or modify something to fit. for the moment i redrilled to locator holes and spun them around and this has helped the engines location and its shakes. did you replace the radiator hoses for it? i have found some car ones that are close and its OK but i would like the right ones.

 

[Neat 1500]

These things do have a history of breaking motor mounts. They actually have a HD mount for those tractors as a "fix" for the originals. Might wanna check those out.

can you get them in the US? and if so where?

 

[sacsr]

Paul,

I bought one new hose for it which was all that Gary Jamieson had.......not sure if the rest are available....mine were in pretty good shape so I bought the hose to put in my "box of parts" for down the road repairs. I am collecting parts as I go.

I am going to check the mounts today....I am also going to disconnect the front pto and check the shaft and joints to make sure it is not coming from there....

Yannyman might know, but I have not checked on the availability of the mounts.

 

[sacsr]

284 International,


Does not smoke.

Runs pretty much like it was running before the head gasket replacement.

Cranks right up.

Will try loosing the injectors to see if that makes any difference.

thanks for the suggestions!

 

[YannyMan]

Jamieson has the mounts, but you better be wearing a diaper when you get the price!


My first YM146 has the old style mounts and one has been broken since i bought it. I'll fix it.... someday...


My 2nd YM146 has the HD mounts as does the GT14. Amazingly enough, there is a pretty big difference between the two. I just need to take the ones off the GT and put them on the 146.

 

[sacsr]

If you get a chance....take a picture of the heavy duty mounts....just interested to see the difference.

Where do they usually break??

 

[YannyMan]

I believe this is the HD one.

 

[YannyMan]

And this is what happens when the regular one breaks. Sorry its burry.

 

[YannyMan]

BTW, I never really noticed it before, but my 2nd YM idles like yours. My 1st is a little smoother.

 

[sacsr]

So the bolt broke?? I definitely don't have the heavy duty ones....will have to consider it later down the line.

Have not noticed any cracks or issues with the motor mounts at this point.

Took off the front pto ( not an easy thing to get to)....but the tractor still has the shakes in low throttle.......runs good in the mid to hid range on the throttle so I am just thinking it is doing what it is supposed to be doing.

Loosened each injector and definitely saw a difference in how the motor was running so it is not the injectors....

Pulled the deck and wire brushed it ....sprayed it with a primer and will paint it with the yanmar red paint I bought from Hoye....main thing is to get the rusted areas covered up so it will slow down the rust process.

Want to be mowing grass by tomorrow afternoon!!

 

[YannyMan]

Yep, the bolts stretch and break.

Yeah, I was trying to mow today. My PTO took a dump on me it seems...

 

[Neat 1500]

if they are the HD mounts i already have them.mine were leaning forward badly so i spun them around and adjusted the rear one so it all lines up. as for the hoses i might just leave them, just a bit miffed i cut a $40 hose too short and can only get 1 out of that auto hose which is the top one.the U shaped one is not a tight enough bend but it will do. i will follow up here with yanmar australia and see if i can get these basic spare parts.i found a big part of my wobbles was the clutch assembly where the bearings sit have worn, so i shifted them and packed them forward and it is now good. one day i will repair all the 1/2 assed jobs properly

 

[sacsr]

Neat,

I got the u shape one from Gary jamieson....he does not have the others.

I hate to say it but this deck paint job is going to be quick and not my best effort. But it will cover up the exposed areas and prolong its use.

All filters, fluids, etc have been changed and everything has been cleaned and greased. Got to put the front pto back on and the deck and she is ready to go.

Just ready to see what it can do.

Yannyman sorry to hear of your troubles.....hopefully today is a new and better day.

 

[sacsr]

Here are a few pics of the mower deck. Previous Owner has made some changes so not sure what is correct......have all the manuals except this deck!

Yanny man will you look at the 4th picture of the piece that hooks up front of the tractor (and with the front pto) and tell me where the spring use to go?? is your pulley bent to the side like this one???

Ran out of Hoye's paint....so going to have to do for now......learned a hard lesson....had primed most of the deck and got in a hurry around the decals and did not do it....it was obvious I had made a mistake when I started spraying the red paint and the old stuff bled through.........lesson learned from here on....use the primer then the paint......

 

[YannyMan]

That thing sure is bent! Both of mine run straight to the pulley on the deck. One lets the belt run to the pulley, one returns it to the PTO.

I took pictures as best I could with the pulley box mounted on my tractor as to where the spring goes. Yours looks correct sort of, but its hard to tell being upside down and facing away from the tractor. One goes in the hole that's on the outside front of the box, one goes to the hole in the bar that runs next to the pulley on the right (facing the tractor) side of the box next to the pulley.

 

[YannyMan]

Here is a picture of my YCM48 deck if it helps...