Gas/Oil mixture-100:1????

[jakee]

I just bought a used 25hp evinrde model# E25TELCUR and serial # E0675754. I need to know what year this might be and if it truly is 100:1 mixture. It says so on the side of the motor but seems odd to me. any help is appriated. thanks, Jake

 

[JB]

Re: Gas/Oil mixture-100:1????

Howdy, Jakee,<br /><br />Welcome to iboats. <br /><br />That's a 1987.<br /><br />OMC changed the recommended mix back to 50:1 shortly after your engine was built, so that is what you should use.

 

[Pony]

Re: Gas/Oil mixture-100:1????

Ditto on what JB says....<br /><br />I have the 1988 Johnny version of that motor................50:1

 

[youngboater]

Re: Gas/Oil mixture-100:1????

I had a 6hp Rude and ran it 100:1 (never new it changed) for about 15years before it pretty much died. Great motor though.

 

[phatmanmike]

Re: Gas/Oil mixture-100:1????

you can feel free to run 100;1 if you want a new anchor

 

[JB]

Re: Gas/Oil mixture-100:1????

The reason OMC went back to 50:1 was not operational problems. <br /><br />Engines that had been running 100:1 were experiencing internal corrosion in storage. . . not enough residual oil film to protect ferrous parts.

 

[BillP]

Re: Gas/Oil mixture-100:1????

JB is right. OMC was seeing too much corrosion on young motors during warranty periods with the switch to 100:1 and they went back to 50:1. 300:1 at idle and 150:1 at full throttle were their numbers for what was actually needed for wear protection. This can be verified IF you able find a past OMC warranty manager from the SE USA.

 

[gatorred]

Re: Gas/Oil mixture-100:1????

i put 100-1 in my tank plus run oil injection too I saw to many of my buddy's blow there's up from lack of oil or other dumb stuff like his kid put sand in gas? i don't think that's a oil problem my other stuff 9.9 and 80 hp run 50-1 or richer my merk's like more oil like 5 gallon's gas to i pint of oil.

 

[CARLOS]

Re: Gas/Oil mixture-100:1????

HI,<br />I use 100:1 with my twins Merc 2.5L 200HP 1994. They work also with the Oil Injection...<br />I´ve used CASTROL TCWIII... <br />They are great, sometimes a lot of smoke at cold condition but after 2 or 3 minutes the smoke dissapear.These engines has more than 1000 hours running and feel good. Only problem with trim motor. I really do not understand Mercury Designers Engineers!!!It´s very difficult to replace the motor brushes when the boat is in water...Please Engineers: thinks about parts maintenance...<br />Best Regards<br />Carlos<br />Desde Venezuela...Good place to live...