Yanmar ym146

YannyMan · Apr 20, 2011

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 · Apr 21, 2011

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 · Apr 21, 2011

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

YouTube - Yanmar 146

YannyMan · Apr 21, 2011

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 · Apr 22, 2011

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 · Apr 22, 2011

YannyMan said:
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 · Apr 22, 2011

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 · Apr 22, 2011

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 · Apr 22, 2011

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.