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    1973 50hp lark Compression Question

    I have a motor that is in the marina for repair. It will not reach WOT of 5500rpm. Compression is 130 each, drop down test of 100 PSI. is OK. Ran 2500 with 19" pitch prop. 4800 with 15" pitch prop and then 3500 with 13" pitch prop. Seems kinda weird? This motor has been put on a Dyno and has...
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    Cupped prop change 1973 50hp

    I have a 1973 50hp evinrude that I put on my 16' Lund fishing boat. I had a 13-3/4X15 prop on it and was running 4800 RPM alone in the boat. When my son and the dog got in we ran 3500. I thought a 13" pitch would help and I put it on. It is a cupped slightly on the fins and the 15" prop wasn't...
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    How close can you get?

    I have a 13 3/4 X15 prop and it is on a 1973 evinrude 50 hp 2 cylinder. I would like to get my RPM's up and go to a 13" pitch. iboats size some of the props at 14x13 and some other sights do too. It looks like old evinrude chart shows a 12 1/3 x 13 for this motor. I don't have room for a 14x13...
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    Trade props?

    Sorry Fill, not buying, selling, trading on the open forum. http://forums.iboats.com/showthread.php?t=231537
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    73 50 HP Cam mark off

    I was having lots of problems with this motor. I rebuilt carbs, new power pack, 2 new coils, timer base, impeller/thermostat. I just couldn't get this thing to run good at WOT. I put a 15" pitch prop from a 19" prop. Anyway, I took it to the boat shop, evinrude specialists? and when I got it...
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    Fuel Filter difference?

    Is an auto inline fuel filter, such as a NAPA Gold filter, the same as a filter made for a boat motor?
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    Does this look right?

    This is a 50 HP 1973 Lark. I am trying and trying to get this thing to rev up past 3000 RPM's under load. I am almost thinking that the linkage may be adjusted wrong or the prop is too big. This motor came off of a fiberglass 15' boat (old) and is on a 16' Lund fishing boat. I can run it with...
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    Nylon Bearing for low speed needle valve

    I need a couple of the nylon bearings that go into the body for the low speed needle valve. This is for a 1973 50 HP evinrude motor. The manual states that it is for a Type 4 carburetor, with fixed high-speed orifice and adjustable low speed needle valve. These were installed on 50 hp models...
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    50 HP 1973 The cause for milky gas only water in tank?

    I have a 73 50 hp evindrude lark that I have had problems with WOT under load. Having 130 psi compression, rebuilt carbs with kits, new power pack, 2 new coils, timerbase, installed another used stator but didn't change anything, water pump impeller kit, thermostat, and linked my roller to the...
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    Can't adjust timing, Timer base repalcement?

    I have a 73 50hp motor I have been working on and am unable to get it to rev high enough to check timing. No matter where i screw the spark advance screw to it will not change the WOT from 2500. I can screw it all the way in or screw it all the way out. No change to motor running. Is the timer...
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    '73 50 hp carb little tiny wire clip lost

    I have a question about a carb and the little wire clip that connects the needle and the float together. I have lost one of mine off of a 50 hp evinrude and was wondering if I needed to make one out of a thin piece of wire or will it hurt to leave it off? Also I popped my fuel pump apart and...
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    1973 50hp Evinrude driving me crazy

    I have been working on this motor for a while now and am having spark problems with it. I have checked all of the tests from the manual except I am unable to check stator volt output because of no meter and there is a 10 day waiting line for boat work around here. Here is my story: Bought the...
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    Would it be OK to ask an opinion on how much is this worth?

    This is a 1978 motor with all controls and wiring, run great. I would like to know about how much a motor like this should sell for.
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    1973 50HP Evinrude no spark after moving

    I bought a boat with a 50 hp motor on it and it ran very well. I switched the motor and the controls to my boat and now the motor will crank OK but has no spark. It ran great before I switched it. What could have went wrong? It runs fine but after swap, no spark?
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    1978 Lund floor covering

    I am putting a new floor in a 1978 16' Lund and would like to keep it original. It has yellow linoleum looking type stuff but it is not slick. As far as I know it is the original floor. Is it possible to purchase this covering? I also would like to replace the decals on the sides. It really is...
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    1975 Chrysler 45 HP Flooded

    I have an older motor that ran OK, (started hard) until I was running in full throttle and the gas line kinked and it died. Now it seems like it floods out and will not run. The carb was taken apart and cleaned, (because there was gas running out of it when chocked). I replaced the plugs and its...
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