Evinrude Carbureter size

[Rud]

Anyone know if this size carby is correct for Aussie 1985 9.9hp Evinrude?

 

[Rud]

Thanks for the quick reply kimcrwbr1, I tried to lodge a full description of my problem earlier but messed it up so the post started with zero information (my first post).
OK, I bought a 1967 Bertram - Caribbean (collectors item made locally in Australia) and it came with a rusty trailer and the Evinrude 9.9 Model No. AL10RLCOM making it 1985.
The motor started on full choke but ran away to full revs then died, had to wait one day to get it to start again.
Following days I used the choke to control the speed a little but it still died (the plugs are wet).
I pulled the carby to pieces (there is no restricter plate) and it is totally spotless, the float needle is set to close when the float is in line with the carb body, tested by blowing into the fuel connection, I also blew though all the orifices and found no obstructions

no obstructions.
I temporarily fitted a clear fuel hose and fuel is getting to the carb.
I have only just learned to set the slow idle jet about 1 1/2 turns out from the seat and the throttle adjustment should be just opening at a line on the roller cam, two things I haven't checked.
I have not checked the size of the jets either, I find on Leeroy' s Ramblings that the main jet should be #34 (.055") for the 9.9hp and #54 (.110"0 for the 15hp.
But I need to know first of all why my carby has the intake throat at 1.18" where Leeroy states the internal throat is 0.500" and at the manifold it is 0.750" although he is talking about a "late" model but he only goes up to 1992, mine could be a 1985 with the old sizes although ...
This is Leeroy's earlier model comment;
The outside visual dimensions of both carburetors appear the same, unless you look INSIDE the throat. If you look in from the rear, you will have to position the throttle plate to a horizontal position to be able to see the throat very well. The 9.9 hp carburetor’s INTERNAL THROAT is .625 dia., 15 hp internal throat is .875 dia. up until late 1987 when they went to a plastic topped carburetor. NOTE this is not measured from either the from or back but the internal throat that you can see on the LH photo below. The outlet or rear throat dia. is the same on both to match the manifold port dia. The idle jet venturi system is also slightly different between the two. The part number for the the pre 1987 9.9 hp Carburetor Assembly is #388936, while the 15 hp Carburetor Assembly is #338273. This increased throat dia. and larger main jet allowed it to breather better and to pull more fuel in, increasing the RPM about 1000 RPM, hence more HP.
I have tried to contact Leeroy but he may not run his ramble anymore so I am relying on you guys to help me out.
Back to original question, why is my carby so much bigger and If my throat is too big it means not much venturi action due to slow air speed, is that correct?
The part number 433992 comes up "Not available, Replaced by 0435701 " which is "Replaced by 0436991" which is L/P 320.67 in MarineEngine.com and none of these are available

 

[racerone]

The high speed jet does not require a special screwdriver on this model carburetor !

 

[Rud]

I would think you would use the jet size for the 1985 model #38 from what I see. The newer plastic top carb your looking to instal has two jet sizes either #34 or #36 depending on model number SEL or REL. You want to make sure the high speed jet is correct or you can cook the pistons real fast running too lean. What is wrong with the original carb again if I missed it?

This is the original carb for me, it came on the motor, I think the bloke sold it to me because he fitted the carb himself and couldn't start it either so gave up, just trying to establish if I need to go troubleshooting (in the rain) when maybe someone can tell me. If the jets fitted are either for a 9.9 or a 15 hp it should still run because that's the main difference between the engines, the pistons, crankshaft, bore are the same for both, only the jets and the exhaust are altered (maybe the reed valves in certain years).
Also thanks to racerone and kimcrwbr1 for adding welcome facts

 

[Rud]

Thanks people, I now know where the main jet is, I am waiting an a compression tester and will make a spark tester with adjustable gap and two electrodes with a centre ground later today.
As to my origial question ...
I am still waiting on that one person who can tell me if the throat diameters are correct for a 9.9hp

 

[Rud]

Main jet is #34 (.055") and a bit of matter was found in it (my mechanic had a look and found that) so it is a 9.9hp carby and the one answer I wanted more than anything has now been answered,the size of the throat, bore, barrel whatever you want to call them, shown in my first pictures work OK for this motor, it will idle smoothly and accelerate to what seems like about 15,000 rpm, (no prop on it in the water bucket).
I thank everybody for their help and can now terminate this thread, I'll leave it open for another day or two in case someone is coming up with more knowledge but then I'll mark it closed. (Damn, why did I place a bid on a compression tester?)