We've got a two month old Yamaha EF2000iS inverter generator with 130 hours on it, going through far too much oil. We bought it brand new.
It uses approx. 100 ml./3.4 oz. in less than 20 hours of low speed, low load operation (eco mode mostly).
When I broke it in, I ran the generator with approx. 600 to 700 watt load for a good seven hours and did the first oil change at 8 hours using the same recommended 10W40 conventional oil as the original fill. The machine's rated continuous load is 1600 watts. I figured that between 1/3 to 1/2 load for that length of time would have been sufficient to break it in properly. Not sure if that's the problem or not. I've broken in a lot of small engines in my day and never had anything use enough oil to register let alone have something this small go through so much oil.
I changed the oil again at 25 hours and at approx. 70 hours, the low oil alert/engine shut down switch began to actuate. By then, the engine had used over 200 ml which is half of the sump fill of 400 ml. I changed the oil again and put in Rotella T 15W40 conventional. I ran the engine for another 20 hours and checked the oil level. It was down another 100 ml. So, it appears that this problem is persistent.
My questions are:
Has anyone else had a similar problem with this make and model generator?
Has anyone had any other make/similar model use so much oil?
Do you think it was the break in procedure that caused the oil consumption?
If not, does anyone have any other suggestion as to why it uses so much oil?
If it is a break in issue (glazed cylinder/unseated rings), is there a way to remedy the situation short of taking the engine apart, re-honing and installing new rings?
Any assistance/information will be appreciated.
Thank you.
It uses approx. 100 ml./3.4 oz. in less than 20 hours of low speed, low load operation (eco mode mostly).
When I broke it in, I ran the generator with approx. 600 to 700 watt load for a good seven hours and did the first oil change at 8 hours using the same recommended 10W40 conventional oil as the original fill. The machine's rated continuous load is 1600 watts. I figured that between 1/3 to 1/2 load for that length of time would have been sufficient to break it in properly. Not sure if that's the problem or not. I've broken in a lot of small engines in my day and never had anything use enough oil to register let alone have something this small go through so much oil.
I changed the oil again at 25 hours and at approx. 70 hours, the low oil alert/engine shut down switch began to actuate. By then, the engine had used over 200 ml which is half of the sump fill of 400 ml. I changed the oil again and put in Rotella T 15W40 conventional. I ran the engine for another 20 hours and checked the oil level. It was down another 100 ml. So, it appears that this problem is persistent.
My questions are:
Has anyone else had a similar problem with this make and model generator?
Has anyone had any other make/similar model use so much oil?
Do you think it was the break in procedure that caused the oil consumption?
If not, does anyone have any other suggestion as to why it uses so much oil?
If it is a break in issue (glazed cylinder/unseated rings), is there a way to remedy the situation short of taking the engine apart, re-honing and installing new rings?
Any assistance/information will be appreciated.
Thank you.