1985 25hp evinrude

well i have a couple of questions. first i must say that 20 years ago i became an omc certified outboard mechanic while i was in school i did this for about 5 years and haven't used it since. however i recently bought a 25 hp evinrude that had been dropped and broken the lower engine case. i ordered a new one it will be here tuesday. so my first question is what else will i need to replace when i replace this part like gaskets and such. i know that i have to pull the powerhead to replace this piece. second questions is about the choke/primer valve. this motor has not run i a while and i am sure at very least the carb needs cleaned but probably rebuilt. however i tried to run it today and went through the basic things before i started making sure i had spark and good compression which i do. my question is do i need to pump the primer valvle or just pull it on. i cannot remeber. i got it to fire for a couple of seconds but not run for any length of time.

thank you
aaron

Re: 1985 25hp evinrude

i don't remember either, try just spraying some premixed fuel into the carb, does the same thing. till you get it running, and can figure it out.

(http://www.evinrude.com/en-US/Accessories/Literature/?popup=true) folllow prompts diagrams, parts list.

Re: 1985 25hp evinrude

Prime by pulling the primer out and pushing in 3-5 times. Start with 3. Are you replacing the exhaust tower or the lower unit? If its the exhaust tower you will need a new powerhead to tower gasket. Replace the impeller and vent/drain screw seals.

Re: 1985 25hp evinrude

For starting cold, I pull and push mine 3 times..on the last pull...don't push it in, start the motor and let warm up a bit then push it all the way in. Works great.Gas only squirts on the pull but when you leave it out it lets gas through.

Re: 1985 25hp evinrude

thanks for all the quick replys i am going to try starting again. come to think of it i was not sure what was going on with the primer valve when i kept thinking that it was not staying out and i kept pulling it out and priming it. i am only replacing the lower engine cover not the exhaust housing.

thanks
aaron

Re: 1985 25hp evinrude

Aaron,
If it's not staying out I'm thinking it must be because it's not getting fuel to your primer and you're pulling a vacuum on it, so the vacuum pulls the primer knob back in. You might have something stopped up---gas line, carb, etc.
just a thought,
JBJ