1957 Evinrude Fastwin 18. Converting to a fuel pump. What fuel pump to use?

24/1 is the correct ratio. I certainly wouldn't go 50/1 but you could split the difference with a good synthetic.

1957 Johnson Seahorse QD18 10hp Oil Mixture - Marine ...

http://www.marineengine.com > showthread > 10690-1...
May 6, 2004 - " First: Anyone know for sure the oil/gas ratio for a 57 10hp Seahorse, is it 24:1 or 50:1??? Second: The motor has been sitting for about ...
Thread: gas mix ratio for 5.5 and 10hp johnson 1957 - Marine ...
May 6, 2010
1954 johnson qd15 10 hp 24-1 or 16-1 fuel ratio? - Marine ...
Feb 10, 2013
Thread: Johnson Seahorse Oil Fuel Mixture - Marine Engine
Aug 30, 2009
What is proper fuel ratio mix for 1957 30 hp Johnson - Marine ...
Apr 21, 2007
More results from www.marineengine.com

1957 Johnson QDL-18 10hp (recommended oil and ratio)

https://forums.iboats.com > threads > 1957-johnson-qdl...
Sept 27, 2017 - Unfortunately there was gas left in the tank (old style pressurized 6 gallon 1956 or prior with hole in middle of diaphragm for fuel pump push ...
1957 10hp Johnson sea horse oil mix? - Iboats Forums
May 4, 2004
1956 Johnson, whats my fuel/oil mixture? - Iboats Forums
Apr 28, 2008
59 Johnson sea horse 10hp fuel mixture ' Boating Forum
May 12, 2009
1962 10hp QD-23R What oil mix does it need? - Iboats Forums
Aug 19, 2011
More results from forums.iboats.com

Under the flywheel.

I'm not entirely familiar with that model off the top of my head. However, the flywheel for that model seems to be 0583001 which is a 74 tooth. With that said, I make no promise but https://www.marineengine.com/parts/johnson-evinrude-parts.php?year=1988&hp=20&model=E20CRCCA&manufacturer=Evinrude§ion=Electric+Starter+%26amp%3B+Solenoid matches that flywheel. Hope that helps some, maybe guides you in the right direction.

Sorry that link didn't go through as I had planned.
The starter drive assembly for the 74 tooth is 321648 — DRIVE ASSY., 11 TOOTH. USE ONLY WITH FLYWHEEL P/N 583001 (74 TOOTH). The starter shows to be 5376 - Outboard Starter, Johnson Evinrude, 18-40HP

try removing the feed pipe off the fuel pump to the carbs and start the engine , put a pipe on the pump into a container and see if its pumping ! ?

I have never seen anyone answer these questions.if you looking for a condenser they are all the same.eg a 1965 40hp condenser will fit a 1955 20hp

3014 is a three horse 1955 Evinrude Lightwin. 16/1 fuel oil mix, points set at 0.020 and the NGK B6S plugs set at 0.030". 80-90W marine grade gear oil is used in the gearcase. Nice motors!

No,check vro fuel pump diaphragm.if primer bulb doesn't get hard when priming is a sign of needle and seat not sealing or a hole in fuel pump diaphragm.

Hi, 50 to1, regards Phil.