Changing out a 912 80 HP in a model IV

[efwd]

That is exactly what I have done. Even the part about helping with zip ties.

[Wheels]

I made some progress on the cooling system today. Got the top tubes cut and I clocked the elbows. this is the layout.

[Wheels]

I am making progress. I mocked up the engine and exhaust manifold and it all fits.
I am mocking up the fuel manifolds tomorrow and wondered how others have connected to the engine. My old set up comes thru the firewall in the center and divides via brass barbed fittings to get to gascolator, fuel pump, pressure gauge, auxpump, fuel return,carbs, fun factor. most of the fittings are on the firewall and inaccessible for maintenance with the engine mounted. Is everyone with a model IV doing that?

[Guy Buchanan]

I moved my firewall penetration to the right side, mostly to reduce heat load on the fuel, but also to make it easy to access. The primary fuel line runs forward along centerline to the base of the firewall, then right in front of the pedals, then up along the edge of the firewall, then penetrates the top of the footwell. It's then a super-easy route to the fuel pump. Thousands of words attached.

[Wheels]

Thanks Guy! My hard fuel line comes up to the right side of the Firewall and then crosses to the center where it penetrates. I think I can easily modify the penetration point to mimic yours. I"ll look in the other "words" you sent and see if I have some blueprints of the other connections I.E. gascolator, aux pump and the like to get an idea of routing. My current penetration on the firewall puts about 5 hose clamps at junctions near the stator assembly. Yikes!

[Wheels]

I see that there may be some fuel lines and push on fittings available in metric sizes as well as Banjo fitting. I think I can nearly duplicate the hose assembly that came with the engine and now it will reach my outboard facing carbs. (model IV needs to switch left and right carbs and manifolds)

I'm looking to source the silicone hose for fuel lines and not finding any. I could use Gates or other fuel hose, but I like the removal of the 5 year rubber replacement by using the silicone stuff. Anyone got any Ideas?

[jabkwab]

As I learned on this great forum you don't have to swap the carburetors for a model 4. Just swap the manifolds.

Keep the throttle & choke connections on the outboard sides for easy adjustment / synchronization.

Jan