Results 1 to 7 of 7
  1. #1
    Join Date
    Dec 2009
    Location
    Spring Valley Il
    Posts
    171

    Default Couple ? on 1973? Evinrude 35 rotary

    It has been sitting in my shed for a while so time to get started. Guessing a 73 with 35 wankle rotary which is going to be a learn as I go. 1. What oil and proper mixture? It has e - start so guessing 12 volt? Any lawn and garden tractor battery Ok initially? Thanks in advance.

  2. #2
    Join Date
    Dec 2009
    Location
    il
    Posts
    1,850

    Default

    Any decent snowmobile oil work fine for that engine. Just don't use boat oil. The original mixture was most likely 20:1, but that was based off oils of the time. With today's much higher quality oils, you should run 40:1.

    Pretty sure it's a 12 v system, but not positive. I'd assume there is a charging coil for the battery, so you could probably start the engine manually, and then put a meter on the battery terminals to confirm system voltage.

  3. #3
    Join Date
    Dec 2009
    Location
    il
    Posts
    1,850

    Default

    Gota love da interwebs!
    Pick a manual, any manual....
    http://www.vintagesnow.com/Evinrude.html

  4. #4
    Join Date
    Nov 2020
    Location
    Wisconsin
    Posts
    2

    Default

    Quote Originally Posted by lotoftoys View Post
    It has been sitting in my shed for a while so time to get started. Guessing a 73 with 35 wankle rotary which is going to be a learn as I go. 1. What oil and proper mixture? It has e - start so guessing 12 volt? Any lawn and garden tractor battery Ok initially? Thanks in advance.
    It has a 12V system. DO NOT run the engine without a battery installed (even a dead one is ok), it can damage the electrical system and ignition power pack.

    As far as the engine goes the BEST oil to use is the original RC oil sold by OMC. Otherwise a good high quality 2 stroke synthetic like Klotz or Amsoil. It’s a 50:1 engine but I would go with 40:1. They are VERY prone to overheating should not run it much above freezing. Must use the surface gap spark plugs as well. They also have a nasty habit of swallowing the secondary butterfly. Most people remove that.
    Last edited by G164; 12-17-2020 at 10:00 AM.

  5. #5
    Join Date
    Dec 2009
    Location
    Baudette, MN
    Posts
    1,961

    Default

    Would be cool to see a video of it running once you get it going. Love the sound of those rotary engines at idle.

  6. #6
    Join Date
    Dec 2009
    Location
    Neenah, Wisconsin is about 40 miles south of Green Bay's Lambeau Field.
    Posts
    2,073

    Default

    Might be a dumb question here but are we mixing 2 cycle oil in the gas? Weren't the Wankels lubed similiar to 4 cycle engines? I had one in an early Mazda RX7. I recall it had twin rotors with an oil sump. Performance was fine but the engine life was poor. They didn't last compared to conventional engines.

  7. #7
    Join Date
    Nov 2020
    Location
    Wisconsin
    Posts
    2

    Default

    No such thing as a dumb question...
    The rotary’s in a snowmobile have the roller bearings lubed by the oil in the fuel. Your Mazda rotary used a conventional wet sump system with a pressure pump to lube the Babbitt style bearings.
    A Rotary is actually a No Stroke engine since it doesn’t have rods/pistons. The roller bearing system is much simpler and lighter weight vs a wet sump system. They do have Apex seal issues (rotor to case seal) and overheating issues with warmer ambient air temperatures, these things always run hot (as in exhaust system red hot when running hard). But, they also have 3 combustion cycles (3 sided rotor) for each engine revolution. THAT’S why they make so much power and are so smooth, but unfortunately not very fuel efficient.
    Last edited by G164; 12-01-2020 at 09:45 AM.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

» John Dee

» January 2021

S M T W T F S
2728293031 1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
31 123456

» Stats

Members: 20,369
Threads: 29,104
Posts: 344,629

» Online Users: 106

0 members and 106 guests
No Members online
Most users ever online was 2,946, 07-12-2019 at 02:11 AM.

» Today's Birthdays

None
Powered by vBadvanced CMPS v4.3.0