Oil Light on

[shovelrider]

I know i've seen somewhere about this, but can't find it. Anyways, was running ym1700 scraping some under brush. Temps around 88/93 index outside, and i am in shady area mostly. Oil stick is on full mark(clean oil), oil / filter change awhile back, haven't used tractor but 2-3 times since. And this morning it came on and hasn't turned off. Was pushing pretty good size loads of brush/dirt/logs etc.. It did however, try to stall a couple of times when running low rpms(1200). I mostly run around 16-1800 while pushing heavy loads or running bushhog. The oil sending unit is about 2yrs. old, maybe light indicator? What say ye' grand Yanmar wizards ??

 

[winston1]

I wouldn't run it anymore without confirmation of correct oil pressure. Trying to stall is a good indication the light is telling the truth.

 

[Gunny]

It may be your current sending unit has gone bad, or maybe it has a piece of trash covering the hole inside blocking a good pressure reading. If you pull the sending unit and can't see anything, then I'd screw in a mechanical gauge and see what that says. The fact that the light is on is telling you that either you have low oil pressure or that the sending unit is bad.
Hopefully it's the sending unit, but a decent quality mechanical gauge will tell the story

 

[shovelrider]

Had another unit, installed it lights off WooHoo ! Going to town tomorrow and get a mech. gauge, what is press. need to be approx.? Like to be able to read press., not wait on a light bulb to tell when it needs some attention paid to it. Thanx Jim

 

[winston1]

According to the I&T manual 35 to 50psi.

 

[normde2001]

I would just call it a fix and move on unless you just want the extra work. Nine out of ten times it's the pressure unit. It transfers at about 4psi. A gauge requires a different pressure unit.

 

[winston1]

I would just call it a fix and move on unless you just want the extra work. Nine out of ten times it's the pressure unit. It transfers at about 4psi. A gauge requires a different pressure unit.

Hoye's sight shows same pressure sender for 220 and 1700. Manual for 220 states light on below 14.2psi.

 

[MesaAZguy]

I installed a mechanical oil pressure gauge along with voltmeter for giggles. It's always good to know what the engine is doing.

 

[winston1]

No doubt I am probably in the minority but do favor oil lights for the simple reason one is likely to notice a red light come on. Unless you constantly monitor your gauge you could have 0 oil pressure before you even notice the gauge. Just a thought. It is important to assure they are in working order.

 

[California]

Here's a longwinded thread I wrote when I had the same experience. Summary: Install the $6 sender that is common for 70's Honda, Subaru, Nissan and get on with life.

Low oil pressure? No, bad sender!


Here's a photo in that thread showing a water pressure gauge I mounted temporarily for diagnosis.