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Joined: Jul 2018
Posts: 2,086
Likes: 80
Tyler Offline OP
SENIOR TECHNICIAN
Hi all

I picked up an inverter generator on the curbside a couple weeks ago.

The other day, I tore it down, adjusted the valves (main problem) cleaned out carby, drained tank and did other general normal things (someone already put a new plug in for me so that’s a win).

It is a Viggen 2500w surge, 2200 continuous. Its code is VIG2500PIG (which gave me a laugh at least).
For all intents and purposes, it’s the same as a Gentrax GS-BECE.

It runs fine, but the idle speed was played around with by the previous owner (burred head). Does anyone know by any chance what the spec is?

I have an email into Gentrax, but no reply, and sent one to another seller so will see about idle speed hopefully.


My main query is a design flaw. The fuel line is about 40cm long overall, with a fuel pump and the carby mounted higher than the pump and tank. It takes 10 pulls to initially get the fuel through the pump and up to the carby.

No problem if you use it every week and store it wet, but I store everything dry (as it won’t be used regularly), so when I need to start it, I will be pulling the cord 10 times again to get fuel up to it.

My question is, would an outboard motor primer bulb work?

I am of the opinion it would, but should I mount it between the tank and pump or between the pump and carby.

I am hoping it will be the latter as it would be easier to access. I will be taking the side panel off (1 screw) to check oil level before each start anyway.

Although I can guarantee I will do all this, then the valve timing will slip and I will be buggered (its 125cc OHC with timing chain)

Thanks
Tyler

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Joined: Jan 2016
Posts: 7,466
Likes: 143
SENIOR TECHNICIAN
Hi Tyler,
I see no reason why it won't work, I have done something similar, just can't remember on what it was, Going between the pump and carby shouldn't be a problem, that would be my choice as well

Joined: Jul 2018
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Likes: 80
Tyler Offline OP
SENIOR TECHNICIAN
Thanks Norm

I was hoping it might be good on that side as it would be hard to reach otherwise.

The ones they sell now have a little primer pump with a metal body which is always an option. At $35 for a primer bulb, I think I will give a outboard one a go.
Just need to work out if I need a 6mm or 8mm. Probably run me under $20

They seem to be an alright little machine - wont get much use though. If it saves the fridges in a long power outage, it will have paid for itself.

Joined: Jan 2016
Posts: 7,466
Likes: 143
SENIOR TECHNICIAN
Hi Tyler,
I guess the size will be controlled by the size of the existing hose, easier to get an equal tee. Have you tried squirting a bit of fuel, aerostart into the carby to get it to start. That would be a lot easier and no problem for you as long as you remember.

Joined: Jul 2018
Posts: 2,086
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Tyler Offline OP
SENIOR TECHNICIAN
Hi Norm

The problem is getting into the air filter. The only way to open the face plate to access carby throat is 8-10 tiny phillips screws and remove 2x 10mm carby bolts, then you have to put the 10mm bolts back or the carby floats on the studs away from the intake

To clean the air filter, you have to phisically remove the AF housing from the engines (aisde from breather) and unclip the rear

Joined: Jan 2016
Posts: 7,466
Likes: 143
SENIOR TECHNICIAN
Sounds like it was designed by somebody with a few loose screws in the head

Joined: Jul 2018
Posts: 2,086
Likes: 80
Tyler Offline OP
SENIOR TECHNICIAN
I agree

They should have made it shallower, put the AF on the front and used 2 clips as opposed to 8-10 screws.

Got a response from one supplier

He said best way is to adjust by ear, then put something with 2500w surge on it, if it stalls, up idle a bit more. Nice bloke though.

Gentrax told me if you put a load on it and the generator stalls, you need a new inverter. That will be $350 thanks. I said I have fixed it by putting the idle up and just want the specs. They responded that the place that sold me the thing should be able to tall me the idle speed. So pretty good service - NOT.

And yes, I used their model numbers and said I had one of their models


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