yamaha 1kva generator
Submitted: Friday, Apr 29, 2011 at 11:45
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Mezza
I am using a yamaha 1kva geneator which is 6 yo. I have had problems for a number of years with the generator surging up and down with no apparent reason. The only thing which seems to remedy the problem for a while is to dismantle the carby and blow it out with a compressor - not always practical in the bush. When I do this there is a small amount of fine dust in the bowl. There are 2 filters between the tank and carby (i have added an extra one) but this hasn't fixed the problem. Am I the only one out there who has this problem?
Reply By: Member - Keith C (NSW) - Friday, Apr 29, 2011 at 12:36
Friday, Apr 29, 2011 at 12:36
Mezza, have you cleaned the jets in the carby? taken them out and cleaned them?It sounds like there is a partial blockage, probably in the main jet, use fine fuse wire to clean it out, while the carby is off, flush the tank with clean fuel, it doesn't take much crud in the jets to make these small engines hunt.Good luck, Keith
AnswerID:
452718
Reply By: Bushranger1 - Friday, Apr 29, 2011 at 12:41
Friday, Apr 29, 2011 at 12:41
One of the biggest problems with infrequently used outdoor equipment is stale fuel. It will gum everything up quick smart.
Modern fuel goes off much faster than in the past so this is becoming a common cause of problems in small engines.
I started using a product called STABIL about 10 years ago & I have never had an engine fail to start since. It will extend the life of the fuel for up to 2 years but has to be added at the time of fuel purchase. It will not fix fuel that is already gone off. I bought my last bottle at Bursons auto but I believe a similar product is available at marine engine suppliers. It can be used in all 4 & 2 stroke engines.
Wont fix your immediate problem but I bet it stops it happening again.
Cheers
Stu.
AnswerID:
452720
Reply By: friar - Friday, Apr 29, 2011 at 16:28
Friday, Apr 29, 2011 at 16:28
Hello Mezza,Ihave the same generator,about 8years old, had a hunting problem when it wae new fixed under warranty, it does not get used for long perids, always drain all fuel out carby included,it always seems to surge when first used after long periods, my fix is to put it under nearly maxium load for about half an hour, this usually fixes it. Friar
AnswerID:
452747
Reply By: Rangiephil - Saturday, Apr 30, 2011 at 10:12
Saturday, Apr 30, 2011 at 10:12
Is it a EF 1000 or the latest model sine wave S ?
If the older one like
mine I fixed the problem.
I bought it from ebay hardly used and it surged like mad. The older ones do not have an idle circuit and
the governor controls the speed.
I did a couple of things.
First
check that the hertz is correct at 50.
Mine was at 60.
Second I emptied the tank and added fresh unleaded not E10
Third I cleaned out the carby . In
mine the emulsion tube seemed to be partly blocked.
After all this it still surged, so I upped the off load speed a little on
the governor and now it is OK.
I also always run some additional load like a 100- 150W light bulb if I am running a variable load.
Finally I added POR15 Fuel Stabilizer to the fuel.
I also try to run it for 15 minutes each month or so to use up any fuel sitting in the carby.
BTW there is a yamaha generator
Forum in teh US which is helpful.
Regards Philip A
AnswerID:
452815