1974 Evinrude 25hp wont run.

[racerone]

That is the idle stop.------You set that for your favorite trolling speed.-----Forces you to use the stop button to stop the motor.

 

[Dalejam]

That is the idle stop.------You set that for your favorite trolling speed.-----Forces you to use the stop button to stop the motor.

there is no stop button, i had to put in a MOB on it.
thank you i will set it tonight if not pooring out.
Thank you
Dale

 

[clemsonfor]

Yes that's the one he was talking about. The old school paper gaskets were one piece any that was built into them. The modern rubber bowl gasket is two piece. That round one and the bowl gasket.

is this the gasket you are refering too. i did replace that when i rebuilt the carb.

 

[clemsonfor]

so the next question is this part circled i know it stops you from turning the handle to a slow speed that it will cause the motor to turn off. question is what is the starting pont for this to be, how many turns out to start off.
next question alot of people put there own into this answer......
at what RPMS should the motr be in to shift into a gear. and how do i tell how many RPMS the moter is running at. a device or tool
thanks
Dale

No there will be a throttle stop screw and the handle also only goes so far when it closes...it just stops twisting the way the handle is designed. The idle stop screw will keep the room from going to low...assuming your low speed idle screw is adjust right as well as everything else.

 

[Dalejam]

No there will be a throttle stop screw and the handle also only goes so far when it closes...it just stops twisting the way the handle is designed. The idle stop screw will keep the room from going to low...assuming your low speed idle screw is adjust right as well as everything else.

i cant seem to locate any thrad that can give me a answer about RPM. can someone tell me the RPM for the motor to be at idle or something that is acceptable. this will also help me in my diagnostic issues .

thanks Dale

i feel like i can concour the motor, sith everyones help.....

 

[clemsonfor]

i cant seem to locate any thrad that can give me a answer about RPM. can someone tell me the RPM for the motor to be at idle or something that is acceptable. this will also help me in my diagnostic issues .

thanks Dale

i feel like i can concour the motor, sith everyones help.....

I'm looking through the 1970 Evinrude service Manual and don't see anything in the quick look before I have to leave the house. But I would say as low as you can get it and not have it cut out in gear in the water.

 

[racerone]

There usually is a stop switch on these motors.---Or ignition switch.----This thread / number of posts is just like the bunny.-----Just keeps on going and going.

 

[tphoyt]

I would shoot for 650 to 700 rpms while in gear and not tied to the dock.
But that just me.

 

[Dalejam]

There usually is a stop switch on these motors.---Or ignition switch.----This thread / number of posts is just like the bunny.-----Just keeps on going and going.

This rabbit hole is deep, very deep .
If I am wrong for posting to much about the same motor tell me. I was under the impression this is where to go to ask theses questions to get help from people who have the knowledge and are willing to help the unfortunate like me.
One day at a time I take this but ask a lot of questions . For I want to learn
Thank you RACERONE FOR ALL YOUR TIME AND HELP.
Dale

 

[clemsonfor]

Your doing fine keep asking. Hopefully you will get this motor sorted out and another classic will be back on the lake.

 

[tphoyt]

I agree
No one is forced to answer your questions and if someone has had enough they are free to jump off the train at any time.
Best

 

[Dalejam]

I appreciate all the help. If it was not for this group the motor would not even be running, funny thing is I have the 1974 Evinrude 25 & also acquired a 1974 Johnson25 hp . Then I asked a simple question and was given a great simple answer the two motors are identical. So when I work on one I do the same to the other. So in my head I figured if I really think the carb is my problem I can switch them around and see if the problem still shows up . If not I have a answer .
Love this tinkering and learning about outboards.
Thank you all
I do appreciate EVERYONE giving input

Thanks
Dale

 

[Dalejam]

Ok new question, I replaced the fuel line . I also put new plugs in it. But I Ipurchased CJ8 spark plugs . But book says J8C . They look identical .. would that make a difference ?
I also bought a device for Rpm. The wire wraps around the plug . You program
It so it will know it is a 2 stroke 2 cylinder.
When I get it low it goes down to 600/500 rpm but idles not good . Took the plugs out they are black.
I also will be getting new gas tomorrow and adding 2 stroke oil to it. 5 gallons of gas to 13 oz of oil .
Can someone tell me what the idle should be to shift into a gear.
Also are those the wrong plugs ???
Thanks as always
Dale

 

[tphoyt]

Yes they will make a difference.
They should be the RJ8C
I’m a fan of NGK and that would the BR6S
I believe but you should double check if you go with NGK

 

[racerone]

Agreed----You need to review your choice of sparkplug for this motor.

 

[Dalejam]

Yes they will make a difference.
They should be the RJ8C
I’m a fan of NGK and that would the BR6S
I believe but you should double check if you go with NGK

I looked online the chart says I was wrong All together should be J4c .
Can some one tell me what is correct

 

[clemsonfor]

Yea I was thinking it was j4c . I looked up cause I am going to get 2 for an older 70s 25hp myself

 

[Dalejam]

Yea I was thinking it was j4c . I looked up cause I am going to get 2 for an older 70s 25hp myself

Thank you for confirming it. Feel better now…

 

[clemsonfor]

Thank you for confirming it. Feel better now…

If you ever wonder or question those charts you can go to anybody the parts websites with the parts diagrams, clink the power head parts list and they list the champion spark plug numbers. Sometimes there obsolete numbers but a Google search result will tell you the current cross reference for the current production champion plug if you Google it.

 

[hardwater fisherman]

Shop Evinrude (BRP) lists UJ4J as the recommended plug. It has an auxiliary gap to increase voltage at the tip and resist fouling. J4C is for the universal magneto.