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onan carb questions (float)

3115 Views 8 Replies 6 Participants Last post by  mdigby
Well I have a new (to me) GT-18 Hydro 917.257070. It has led a rough life and I'm doing some of the "routine" maintenance that has been ignored for some time.

I disassembled and soaked and cleaned the carb. I reassembled with the old gaskets and float and it ran great, for a while. It now runs like poop.

The next to do items are new fuel line from the filter to the tank, and a float for the carb (it has the "original" foam type float).

I have searched and it is recommended to buy the brass float.

My question is: should I buy the Onan brand float with the assist spring or can I buy the knock-off and get the same results?

The Onan float is about $50 and includes an "assist" spring.

The "off brand" float is on eBay. It runs about $25. It appears to be compatible, but does NOT have the float spring.

Do I NEED to spend the extra $25 for the spring? Has any one bought the knock-off and then had to replace it with the onan to get it to run right?

I'm torn...

Thanks for your responses.
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Thanks for the help guys.

I'll order a float and get the next step started.

Today, I replaced the clutch pivot bushing, the clutch spring, the clutch pulley and the motor to trans belt.

It is a whole lot better than when I got it, but she ain't a looker.

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Thanks for the help guys!

A replacement brass float solves the problem! Now it runs!

(The next step is adjusting the hydro linkage :thThumbsU ) It goes forward and backward, but after reversing,when I put it back in neutral, it continues to reverse! If I then move the lever into the forward range, it will stop.

Either adjustment or worn parts. I'll need to see which. :thanku:
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