c-81 engine swap

[ricksrj58 273]

i have never had a engine with a fuel pump so heres my stupid question lol,

the onan has a fuel pump,will it matter if the gas tank is above the engine?

i do not know if the gas would flow thru the pump and flood the engine. :omg:

[gwgdog66 23]

The fuel pump won't allow the fuel to flood the carb or engine, when it is off. Unless the internal diaphragms go bad. Knock on wood, I've only had one go bad on me.

[TT-(Moderator) 1,162]

Fuel pump or not, it's the float needle and seat in the carburetor that restricts or stops the flow.

Fuel pumps normally have "check valves" to keep the fuel from draining back through the line if the tank is below pump level.

[ricksrj58 273]

thanks guys,i know stupid question but i just wanted to know about the pump lol.

heres a pic of my progress.

http://i1000.photobucket.com/albums/af124/...58/100_0993.jpg

[gwgdog66 23]

thanks guys,i know stupid question but i just wanted to know about the pump lol.

heres a pic of my progress.

http://i1000.photobucket.com/albums/af124/...58/100_0993.jpg

Oh Buddy!

Here I was thinking another Kohler, and ya dropped that big boy in there.

:omg:

[rickv1957 75]

You should have all the power you need !,Rick

[ricksrj58 273]

thats what im thinking, i got the onan real cheap and figured i would make a puller.now i just need to talk to someone who can make me a adjustable hitch with wheelie bars and i will be set.

[300zx 7]

Ricksrj58, I just joined and saw your post. I am preparing to put a 520 engine in my C-121-8. It looks straight forward to me except for the PTO. Can you give me any advance warning on the things I am going to run into and have you adapted the PTO yet?

[fireman 1,022]

Here is a link to my thread here on Redsquare about my C-81 that I dropped an Onan 20 into. Check it out as it has a lot of info about the swap.

http://www.wheelhorseforum.com/index.php?...topic=15853&hl=

[rickv1957 75]

300ZX Hello and Rick

[300zx 7]

Rick, thanks for the welcome.

Fireman, I read your thread. Excellent job and very interesting! Did the Pto link up with the C series controls OK?

[fireman 1,022]

It did link up but I was able to buy a rod from a 520 and I used that. It is a little different than the stock one.

[TT-(Moderator) 1,162]

Did the Pto link up with the C series controls OK?

The pieces from a 416 (Onan-powered) machine are exactly what you need.

It's basically the same as what you're building - except for the very top section of the hoodstand. (and the obvious other sheetmetal differences)

[300zx 7]

Thanks for the input.