Yamaha 2000 ie. running eratic

[ivbinconned]

We r on our trip south and when I start it it runs ok for about 5 min then will almost die but then revs right back up again. Some times every 5 to 10 seconds or maybe 40 to 60.
Never dies completely.
I pulled choke slightly....still does it. Cracked fuel cap. Still does it. Turned off eco switch. Still does it.
Under big load still does it??

[FF286]

Mine ended up going back to the dealer and was rebuilt. Runs fine now, was only the second one they had do that. You could faintly smell the burnt oil at times when it was running. I have not had to add any since.

[wilber1]

I've always use Mobil 1 in my EU2000. It isn't called for but air cooled engines can get toasty and it takes less than a quart, so why not.

[pianotuna]

Many generator manuals suggest the first oil change at 20 hours. There after--every 50 or 100 hours. I went to synthetic because I knew I would be doing cold weather starts.

[ivbinconned]

Will they use oil during break in period? Feel bad I didn’t check it. I doubt it has 50 hours on it. Just didn’t think it would be burning oil

[GordonThree]

ivbinconned wrote:
Oil was low. Sucked out what I could.
Now runs fine. I thought with oil alert it would not run atall.
Thanks my friends.

Good to hear it was an easy fix.

[ivbinconned]

Oil was low. Sucked out what I could.
Now runs fine. I thought with oil alert it would not run atall.
Thanks my friends.

[SoundGuy]

ivbinconned wrote:
What kind of oil should I replace with. Syn or regular.

GordonThree wrote:
I suppose you could use Syn but what's the point?

Back when I was experimenting with starting my 13,500 BTU A/C with the first of 2 Honda EU2000i gensets I owned and was having mixed results even in moderate temps an rv.net forum member suggested swapping out the dino oil for synth. I switched to Mobil 1 and the genset thereafter would reliably start that A/C each and every time up to ~ 85F. :B

[1320Fastback]

Jets are plugged, they are microscopic.

If you don't have the tools, space and know how to pull the carb and clean it out search around you for a Yamaha motorcycle dealer and their service department will be able to overhaul it for you.

[bguy]

Oil

[GordonThree]

ivbinconned wrote:
What kind of oil should I replace with. Syn or regular.

I use conventional 10w40 oil as spec'd in the manual. I buy Valvoline 5 qt jugs when it's on sale, lasts a few seasons. Last sale was a buy one get one free, so 10 qts of oil for $22 bucks, will last my gens a long time.

I suppose you could use Syn but what's the point? These small engines aren't pumping oil anywhere through tiny passages, valves, filters, etc, they just splash a little around from the oil pan as the crank rotates.

[rrupert]

Has anyone mentioned that only Non-Ethanol gas should be used in small engines? My little Yamaha EF1000is was running very rough and finally quit. I took it into the dealer shop and they tore the carb down and cleaned it. It ran like a top. I was told to only run Non-Ethanol gas from then on. The ethanol leaves little particles in the carb.

[wilber1]

My Honda was surging. I tried Seafoam but no good. Carb needed cleaning. The jets in these things are tiny and it doesn't take much to varnish them up. Now I just use no ethanol fuel and if I'm not using the generator for awhile, I drain the tank then run it till it quits. I never store it with fuel left in the carb, stabilizer or no stabilizer.

[Grit_dog]

Add some to see if that fixes it. When full, oil should be just about spilling out sitting level.
Changing the oil, just have to tip it over and pour it out. Little teapot, lol.
If filling oil doesn't work, then sea foam. If that doesn't work then carb may need to be pulled apart and cleaned.
Even with good practices with fresh fuel, sometimes ____happens. Buddys son's dirtbike. Not new, but it is spotless and he knows how to take care of engines as good as anyone. It started sucking little pieces of varnish or something into the carb. No idea how or from what. Same fuel, same cans as other bikes, only no E or race gas, etc.
weird inexplicable deal. Put a filter on the line and it's catching little pieces of "stuff" from the tank. This is after having it for a year or so.

[ivbinconned]

Oil may be low. Sitting on flat surface I have to tip it a bit to see oil. To change do you suck it out?
What kind of oil should I replace with. Syn or regular.