evinrude big twin 35

[thekornkid]

hello,<br />we have an evinrude big twin 35, dont know the year or anything else, the id number is <br />2593115047<br />there are a few questions that we have and if you could help us, it will be greatly appreciated<br />1. how is the gas mileage on these things<br />2. how much oil do we put in the gas and what kind of oil do we use... do we use 87??<br />3. how do we take the flywheel off so we can change the spark plug wires/points/condenser???<br />thank you very much

 

[rsl31652]

Re: evinrude big twin 35

gas mileage is ...poor mix is 50:1 you need a flywheel puller

 

[alcan]

Re: evinrude big twin 35

Hi Kornkid<br />Your motor is a 1957 35hp. Yea these motors are not known for fuel economy. But thats ok, because the fun and power is tops. The first thing you'll want to do is obtain a manual. Most librarys have some. If not buy one. I use an automotive harmonic ballance puller, you can get this at any auto parts store. The fuel mix is actualy 24:1. That will be a whole quart of TCW3 to six gals of gas.As far as fuel grade is concerned they run just about anything, Iwould lean more toward the mid grade.

 

[fireman 757]

Re: evinrude big twin 35

I have this exact same engine. I used to run 32:1 even though it calls for 24:1. Engine seemed to run better and have had no trouble with engine wear at high speeds. Have run this engine every weekend (and some weekdays when the wife won't catch me) for 20+ years.<br /><br />the last few years I have been running a high grade 4 cylce oil. I have an old dealer (he is 76 and been in business for 56 years) that told me these engines were designed for this as there was no 2 cycle oil then. He is right!! The engine runs smoother, cooler, and idles better than ever before. People who see this beast on my boat can't believe how smooth it idles and how fast it runs.

 

[oldboat1]

Re: evinrude big twin 35

I also have a '57 Big Twin. I haven't experimented with regular SAE 30 oil yet, although it's what they ran with in the '50s. Based on Fireman's experience, I might try it. Using newer TCW-3 oil, I found that the mix it ran best on was 32-40 to one. <br /><br />Look for a lot of water out of the exhaust port on the rear of the motor leg, if the water pump is working right. Or rather, suspect the pump needs work if you are not getting a heavy spray out of the exhaust port.<br /><br />There should be a removable cover on top of the flywheel that will allow you to inspect and set the points without removal of the flywheel. (You can also see the coils -- Look for cracking to help determine whether the coils should be replaced.)

 

[Tracy Coleman]

Re: evinrude big twin 35

thecornkid<br />I'm going to have a say that I don't agree with what fireman 757 says in regards to oil. One, the engines were not designed to run on 4 cycle oil. Does your car run oil in the gas?, or have needle bearings on the rod and wrist pin, roller and needle bearing on the crankshaft, ect. The oil that was recommended during that time was a non-detergent 30 wt. because there was no better oil generally available. The reason outboard oils were developed a few years later, the added horespower and rpm and need for an oil without much of what was in 4 stroke oils. 4 stroke oil's<br />purpose is not to be burned but filtered and run continely in the engine. Two cycle oil's job is to mix with the gas, lube the internal parts on one pass through the engine burn completely without leaving deposits in the combustion chamber. A high quality 4 cycle, high detergent, lots of additives that leave deposits is just what the manufactures do not want in their engines. Johnson/Evinrude do not or have not ever recommended any grade of 4 cycle oil over an outboard oil. With the excellent outboard oils available today, one of the best being Evinrude Ram oil, it would be foolish to use anything else. Any of todays TCW-3 outboard oils are far better than what was first available in 1964 when the Two Cycle Watercooled standard was set to get away from automotive oils, we are up to standard #3, with improvement #4 around the corner. 24/1 or 32/1 ratio works fine. Everybody has an opinion, I'll follow the factory. Some people use corn cobs, I prefer the other.<br />Backfire