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  1. J

    WOT roller setting

    59573B 1975 50hp long story I won’t get into involving someone “helping” when the engine suddenly died during docking and wouldn’t restart. This “mechanic” made multiple adjustments to timing and the carbs that got the engine started and let me limp back to the dock. But didn’t solve the...
  2. J

    Fuel Hose Size - pump to carb 50573B

    I need to replace a section of fuel hose form the pump to the top carb https://www.iboats.com/shop/engine-parts/1975-Evinrude-50573B-Fuel-Pump-Parts.html Part # 9 in this picture 033395 I was hoping this is standard fuel hose i can cut and clamp - but it doesn't give the O/D or I/D specs that...
  3. J

    Power Pilot backs off from WOT

    ive got a 75 evinrude 50 50573b with a Power pilot control box. No issues with the box’s normal function. But I noticed today (when I finally had my first chance for sustained WOT) than if I put it down i’ll Get about 5400 but it will back itself off quickly to about 4000 and then slow creep...
  4. J

    1975 50 HP Evinrude - Matching Prop To lower Unit

    So i recently finished refurbishing a 1975 Evinrude 50 (13 Spline) - on a 16’ Cobia Bowrider of the same year. the gearbox keeps me limited on prop selection. anyway - what came with it was an OMc 14/13 that hit 4900 RPM at WOT and 22 on GPS. i decided to go 4 blade and drop 2-3 pitches and...
  5. J

    Don’t neglect your coils and wires!

    Not a question as much as a story: TLDR: new coils and wires and cheap insurance and a cheap fix. been putting a 75 Evinrude 50 back together. First trip out it ran well enough except for some stumbles and rough idle I chalked up to needing to tune the carbs in correctly. later that week I...
  6. J

    Whats this screw do?

    Pulled apart my controls to fix the binding. And I took out this set screw (#38 on the parts diagram) and i put it back in. But i'm not sure if there is a specific setting. Any advice would be appreciated...
  7. J

    Shift Rod Height - Different Numbers - Different Numbers in Different Places

    I have to ask because this shift rod is driving me nuts. In the Secret File it says i should be 20-29/32 for my 1975 Evinrude 50HP Long Shaft. The Boatinfo Manual says 21-5/16 on page 503/ section 8-189 http://www.boatinfo.no/lib/evinrude/manuals/1971-1989johnsonevinrude.html#/502 I'm hoping...
  8. J

    Shift Rod Orientation - sorry for simple question.

    Ok - setting the proper shift rod height tonight and hopefully getting that LU on and functioning again. I had a terrible time getting it on before (probably because the height was wrong - but anyway) So on my 50573B how is the rod supposed to be oriented to get into the shift rod lever...
  9. J

    Removing Head on Evinrude 50hp 50573B

    Ok - so today i'm removing the head to replace the head gasket, pressure relief valve and support parts and also the thermostat. I know the big worry here is that the head bolts sheer off or snap - so i've been hitting them with PB blaster for the last 3 days to hopefully help out. Is there...
  10. J

    Help me identify Trim Cyl - 50HP Evinrude - 50573B

    Trim ram leaks after trim down is complete - leaks right of the top like a soda can that was shaken up! so looks like a rebuild is in order. But i can't find part numbers. Could someone point me in the right direction? All i've found has a 2 ram system. Thank you
  11. J

    New Old Boat (Project Cobia) and it’s original Evinrude

    well my habit continues. picked up a 1976 Cobia 16’ bowrider yestersay with a very clean looking 75 Evinrude 50573B. previous owner said the engine wasn’t running after a few trips of worsening idle and then a no start. All reads carbs to me but I got it for such a great price I couldn’t turn...
  12. J

    Long time boater - New to small engines. Few questions.

    in advance: love this site. I’ve lurked for a long time. Constantly reviewing old posts. But where I am in a new spot. always having at LEAST a 90hp engine. We now live a happy walking distance from a local reservoir and river. As such I came across a GREAT deal on a 15’ fiberglass boat...
  13. J

    1996 Evinrude 25hp Water Issue?

    So I’m looking to snag a little aluminum Jon Boat or skiff to do some lake and river farting around. I wast test riding a 16’ Alumacraft with a 25 E-rude 2 stroke. Shes definetly old and in need of some love - and I enjoy a project. anyway, it started first push (electric start). But there was...
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