Need A Parts List / Service Manual 1953 Big Twin 25 Hp S/n 25012-72322

[WILLANDIBIS]

HELLO, THANKS FOR ALL THE PREVIOUS HELP IBOATS! THIS IS A PRICELESS SITE WITH LOADS OF USEFULL INFO. I AM REVIVING A VINTAGE EVINRUDE 25 HP BIG TWIN WITH MY GRANDFATHER. SO FAR WE'VE DONE THE COILS POINTS CONDENSORS WIRES BOOTS PLUGS IMPELLER CLEANED THE FUEL TANK (STILL A LITTLE RUSTY) REBUILT CARB .& REPLACED FUEL LINES. ID LIKE TO REPLACE THE LOWER UNIT OIL BUT DONT KNOW WHICH TO USE. IT CALLS FOR HYPOID OIL BUT I DONT KNOW THE WEIGHT. WOULD A CURRENT HIGH VIS GL-5 MARINE OIL DO?? I LIVE IN FLA AND DONT PLAN ON GOING INTO SALTWATER (WITH THIS MOTOR). SHE'S LIVED IN OHIO ALL HER LIFE AND HAS BEEN IN A BARN SINCE 79 W/O RUNNING! IM ABOUT READY TO CRANK HER OVER AND WOULD LIKE ANY INPUT ON WHAT TO LOOKOUT FOR OR ANYTHING I MAY HAVE LEFT OUT. COMPRESSION IS 80PSI FROM BOTH CYLINDERS. THANKS IN ADVANCE FOR ANY HELP YOU MIGHT HAVE.

INFO I CURRENTLY NEED: MY EMAIL IS EDIT Sorry, Will. No Email addresses allowed.

-PARTS CATALOGUE & OR SERVICE MANUAL (PDF MAYBE??)
-GOOD LOWER UNIT OIL BRAND / WEIGHT
-GOOD OIL RATIO FOR FIRST TANK / THEREAFTER (24:1 ?)
-TORQUE SPECS (FLYWHEEL NUT AND LOWER UNIT BOLTS IN PARTICULAR)
-AND ANY SUGGESTIONS PLEASE!!

S/N 25012-72322

 

[F_R]

Re: Need A Parts List / Service Manual 1953 Big Twin 25 Hp S/n 25012-72322

HELLO, THANKS FOR ALL THE PREVIOUS HELP IBOATS! THIS IS A PRICELESS SITE WITH LOADS OF USEFULL INFO. I AM REVIVING A VINTAGE EVINRUDE 25 HP BIG TWIN WITH MY GRANDFATHER. SO FAR WE'VE DONE THE COILS POINTS CONDENSORS WIRES BOOTS PLUGS IMPELLER CLEANED THE FUEL TANK (STILL A LITTLE RUSTY) REBUILT CARB .& REPLACED FUEL LINES. ID LIKE TO REPLACE THE LOWER UNIT OIL BUT DONT KNOW WHICH TO USE. IT CALLS FOR HYPOID OIL BUT I DONT KNOW THE WEIGHT. WOULD A CURRENT HIGH VIS GL-5 MARINE OIL DO?? I LIVE IN FLA AND DONT PLAN ON GOING INTO SALTWATER (WITH THIS MOTOR). SHE'S LIVED IN OHIO ALL HER LIFE AND HAS BEEN IN A BARN SINCE 79 W/O RUNNING! IM ABOUT READY TO CRANK HER OVER AND WOULD LIKE ANY INPUT ON WHAT TO LOOKOUT FOR OR ANYTHING I MAY HAVE LEFT OUT. COMPRESSION IS 80PSI FROM BOTH CYLINDERS. THANKS IN ADVANCE FOR ANY HELP YOU MIGHT HAVE.

INFO I CURRENTLY NEED: MY EMAIL IS EDIT

-PARTS CATALOGUE & OR SERVICE MANUAL (PDF MAYBE??)
-GOOD LOWER UNIT OIL BRAND / WEIGHT
-GOOD OIL RATIO FOR FIRST TANK / THEREAFTER (24:1 ?)
-TORQUE SPECS (FLYWHEEL NUT AND LOWER UNIT BOLTS IN PARTICULAR)
-AND ANY SUGGESTIONS PLEASE!!

S/N 25012-72322

"Hypoid oil" is automotive 90 weight gear oil. That's what they used back in those days. Yes, the modern marine hi-vis or 80-90 outboard gear oil will actually be better.

Flywheel torque is 60-65 ft/lbs. Tapers to be clean and dry before assembly

 

[wbeaton]

Re: Need A Parts List / Service Manual 1953 Big Twin 25 Hp S/n 25012-72322

24:1 with TC-W3 outboard motor oil is fine right from the start, but pre-lube the cylinders and crankcase as best you can with oil (pentrating, 2 stroke, whatever) before you try to start it.

I prefer to use synthetic 2 stroke oil as it smokes less and is biodegradable. Conventional oil is fine too.

The parts manual is on its way.

 

[JB]

Re: Need A Parts List / Service Manual 1953 Big Twin 25 Hp S/n 25012-72322

Suggestion. Please avoid all capitals. It is harder to read and on the internet it is considered shouting.

 

[WILLANDIBIS]

Re: Need A Parts List / Service Manual 1953 Big Twin 25 Hp S/n 25012-72322

sorry for the caps lock. i thought it was easier to read.

thanks again for the quick replies and pdf files. you guys are great!

 

[WILLANDIBIS]

Re: Need A Parts List / Service Manual 1953 Big Twin 25 Hp S/n 25012-72322

Should i lean out the oil ratio after the first tank or two of gas?

 

[wbeaton]

Re: Need A Parts List / Service Manual 1953 Big Twin 25 Hp S/n 25012-72322

Should i lean out the oil ratio after the first tank or two of gas?

No, Stick with 24:1.

 

[dieselduster]

HELLO, THANKS FOR ALL THE PREVIOUS HELP IBOATS! THIS IS A PRICELESS SITE WITH LOADS OF USEFULL INFO. I AM REVIVING A VINTAGE EVINRUDE 25 HP BIG TWIN WITH MY GRANDFATHER. SO FAR WE'VE DONE THE COILS POINTS CONDENSORS WIRES BOOTS PLUGS IMPELLER CLEANED THE FUEL TANK (STILL A LITTLE RUSTY) REBUILT CARB .& REPLACED FUEL LINES. ID LIKE TO REPLACE THE LOWER UNIT OIL BUT DONT KNOW WHICH TO USE. IT CALLS FOR HYPOID OIL BUT I DONT KNOW THE WEIGHT. WOULD A CURRENT HIGH VIS GL-5 MARINE OIL DO?? I LIVE IN FLA AND DONT PLAN ON GOING INTO SALTWATER (WITH THIS MOTOR). SHE'S LIVED IN OHIO ALL HER LIFE AND HAS BEEN IN A BARN SINCE 79 W/O RUNNING! IM ABOUT READY TO CRANK HER OVER AND WOULD LIKE ANY INPUT ON WHAT TO LOOKOUT FOR OR ANYTHING I MAY HAVE LEFT OUT. COMPRESSION IS 80PSI FROM BOTH CYLINDERS. THANKS IN ADVANCE FOR ANY HELP YOU MIGHT HAVE.

INFO I CURRENTLY NEED: MY EMAIL IS EDIT Sorry, Will. No Email addresses allowed.

-PARTS CATALOGUE & OR SERVICE MANUAL (PDF MAYBE??)
-GOOD LOWER UNIT OIL BRAND / WEIGHT
-GOOD OIL RATIO FOR FIRST TANK / THEREAFTER (24:1 ?)
-TORQUE SPECS (FLYWHEEL NUT AND LOWER UNIT BOLTS IN PARTICULAR)
-AND ANY SUGGESTIONS PLEASE!!

S/N 25012-72322

 

[dieselduster]

Hi Will, Like you and your grandfather, I aquired a 25 Big Twin 25012 43 years ago and had it sitting in my garage since then. I pulled the flywheel off today and the coils are split all over. Wondering if you still have any info on theses motors such as service manual and parts manual? not having much luck finding any info on this beast.