evinrude 20hp 1986

[hvacman]

ok, just got this motor about a week ago, have rebuilt the carb, replaced the lower unit oil, replaced the water pump, replaced the plugs.<br />checked compression, checked spark.<br /><br />motor continues to cough everynow and then, "is this from running lean or what?" the motor ran great the other day, after about 30 mins of running the motor all of a sudden stoped, so i tried to restart and it restarts fine, runs in idle but as soon as i give it gas it dies. Just got done rebuilding the carb again just to make sure i didn't miss anything.<br />same thing try to give it gas and it just dies. The coughing and snd such is still present, but i can live with that, but the dieing under load aint gona work out. Please help me. I've got a manual the seloc manual and i'm about at wits end with this thing, my wife just laughs at me everytime i go outside to mess with this damn motor.

 

[OBJ]

Re: evinrude 20hp 1986

Welcome hvacman!<br /><br />Drop by my house and fix my air conditioning and I'll help ya' fix yer engine.......<br /><br />NAWWWWWW....just kidding... <br /><br />Sounds like ya' tackled all that should be done with a used motor.<br /><br />When ya' rebuilt the carbs, did you blow out all the passages with choke and carb cleaner and follow up with air? It's a good idea. Did you put in a new carb kit?<br /><br />Needle setting....I start with 1 1/2 turns out from GENTLY seated. Once the engine is warm, I kick it into gear and fine tune the needle for best idle.<br /><br />Cam follower roller....look just behind the carb. There is a roller riding on the cam that is just under the flywheel. If you look at the cam, there should be a hash mark...maybe two. When advancing the throttle, the cam will rotate around and hit the roller. At this point, the throttle plate should just start to crack open. If not, adjust the throttle lever on the starboard side of the carb. There is a screw there for this.<br /><br />How's the fuel lines? All plyable and have a firm grip on their connections? Replace any lines that have gotten hard with age.<br /><br />Let's start there and see what happens.<br /><br />Keep in touch.<br /><br />Edit: Just one more thing....how's the engine temp? After running a while, you should be able to put your fingers on the flat area on top of the block (just in front of the head) for several seconds. If the area remains cool to the touch, you may need to replace the t-stat. If it's really hot, replace the t-stat.

 

[hvacman]

Re: evinrude 20hp 1986

shew thanks for the reply dude.. i'm sitting here looking for a reply, yes the motor stays cool to the touch the whole time i had it running, i do have a t-stat kit here looking at me, but i can't seem to find the place it goes. and about the roller. I have adjusted it alittle, when i first got the motor the thing would roll then come forward and open the throttle but after i let off the gas it wouldn't roll back. So i loosend the screw that hold's the roller and now it rocks back and forth. I would gladly trade some hvac work for this lol.. it's killing me. well not really but my wife is making my life harder everytime i fill up my 55 gal drum with water and start messing with this thing.. <br /><br />thanks for the reply dude

 

[hvacman]

Re: evinrude 20hp 1986

OH and yes i hit em with the carb cleaner and compressed nitrogen(only thing i have sitting around other than freon" seems to run better but not at high speed

 

[OBJ]

Re: evinrude 20hp 1986

Set the roller as I described. It'll be OK.<br /><br />T-stat....looking at the back of the motor, you will see the head. Over the head is a cover plate held on by 11 or 12 bolts. This plate must be removed to get the t-stat out. It'll be at the top of the head when the plate is removed. Pain in the patut but a warm engine will help. You will need a new cover plate gasket also. PN 327674.<br /><br />How did you set the low speed needle?<br /><br />Hey....N2 works. And just crack another longneck if she gets on yer wires to much......works fer me...... <br /><br />Post me your model number if you could.

 

[hvacman]

Re: evinrude 20hp 1986

long day at work, i did however get a chance to let the motor heat up and it did heat up, but not to hot, i'd say around 125-140 and stayed there.<br /><br />for the lowspeed i did like you said i seated it and unscrewed it 1 1/2 turns. I put the boat in the water and with it coughing and sneezing attemped to adjust the lowspeed, there seems tobe no real difference when i adjust the lowspeed screw, the spark plugs are wet and black when i pull em out, i reclean em everytime i pull em out. I did take the boat from the dock for a min to see how it acted under load, i opened it up and it took off, but after a min or so it starts to reduce speed and start surging. I pumped the ball and it picked up again. Already replaced the fuel line from the tank to the motor and put hose clamps in place of the zip ties installed, but still no joy. As for the model number i will get it for you tomarrow bro, it's late and i have seen enough of that motor today. Thanks for your help man. I have a feeling the fuel pump is messed up.

 

[hvacman]

Re: evinrude 20hp 1986

ok i think it's a 86<br /><br />the model number is<br /><br />e20grcos<br /><br />and i do think the fuel pump is bad.. not sure though..

 

[OBJ]

Re: evinrude 20hp 1986

85' hvac.....here's how to figure..<br /><br />I N T R O D U C E S<br />1 2 3 4 5 6 7 8 9 0<br /><br />"CO" in the model number tells you the year. And the "G" in the model number is a "C".<br /><br />125 - 140 sounds good at idle.<br /><br />Couple things....When you rebuilt the carb, did you set the float by inverting the carb body and setting the float level with the bowl gasket surface....(needle in place)?<br /><br />Turning the low speed needle in should have made a difference....sounds sorta like a lean sneeze.<br /><br />Pumping the primer ball while under way told a lot. If the engine picked back up, sounds like the pump is ready for rebuild/replacement. A quick check is to remove the pump inlet cover and blow through the outlet nipple. You should not be able to blow back through the pump from the outlet nipple.<br /><br />Did you check to make sure the throttle plate is coming all the way open at WOT? Just put it in gear (motor not running and spin the prop) and go to WOT. Look in the carb throat and make sure the throttle plate is flat across the throat. If it ain't, lemme know.<br /><br />OK...let's see where we are from here.

 

[hvacman]

Re: evinrude 20hp 1986

ok thanks i'll check and make sure i didn't mistake the D for a o.<br /><br />no i didn't spend to much time on the setting the float. i did however try to get it close. <br /><br />turning the low speed needle in did make the engine start sneezing.. and too far it cut off, but the engine runs so rough at idle that i can't really tell what's happening.. :<<br /><br />i'll check on the fuel pump tomarrow and report back i'm gona order a kit tonight. Does napa carry that sort of thing?<br /><br />yes the throttle plate is flat across the throat when i open the throttle all the way up. Before you told me to adjust it, it was going to far.<br /><br />thanks for your time obj i'd be lost without it.

 

[OBJ]

Re: evinrude 20hp 1986

Hang in there partner....we'll get ya' going....or drink a lotta' longnecks in the process of trying.....

 

[OBJ]

Re: evinrude 20hp 1986

^

 

[hvacman]

Re: evinrude 20hp 1986

took the fuel pump apart and checked it over, looks kinda rough. I ordered a new kit to fix it up with.<br /><br />i just got home from workie so i don't have anytime to mess with it anymore today.. but tomarrow is another day

 

[OBJ]

Re: evinrude 20hp 1986

Look at the diaphram hvac....they can get "bent outta' shape" so to speak. Pin holes can happen also. Hope you laid it out to remember how it goes back together..... If you got the OEM kit, directions are in it.

 

[hvacman]

Re: evinrude 20hp 1986

yep got the oem kit from a evinrude shop down here.. damn they raped me but it's cool. better than sitting around waiting for it.<br /><br />put it together, still had alittle cough in the idle, adjusted the idle mixture and poof. Engine sounds great, Went ahead and orderd a head gasket.<br />So when that comes in i'll replace that stat. Gona try it on the water tomarrow. Cross your fingers

 

[hvacman]

Re: evinrude 20hp 1986

omg... i lost the keeper that keeps the shift rod connected to the lower unit, little black piece. ARGH any idea what the part is on that, or what i could use in it's place?

 

[OBJ]

Re: evinrude 20hp 1986

PN 325625....$3 and some change. Just may as well go back over to the dealer and get one if ya' can find it.....then after the engines back together, the one ya' lost will show up.....

 

[hvacman]

Re: evinrude 20hp 1986

yep.. fell in the driveway where i was working.. black small pieces and gravel don't mix, anyhow used some metal tape in it's place.. worked out great, got it out on the river, idled like a dream, everything looked good.. got it up to wot and was moving along then the engine started surging again bout 10 mins into the trip, started pumping the primer and took away the surging, so i decide to take the top off the motor and get to work and see wtf is going on, well i see a small amount of gas at the bottom of the fuel pump, so i tighten up on the clamp, as soon as i touched the screw it broke the bottom nipple off the fuel pump............... argh........... <br /><br />and i was down river, anyhow made a quick decision to just hook the fuel like straight to the carb and pump my way back to dock.. it worked great but now i need a whole new fuel pump. Also i think i need to get my sync set up alittle better i have to work it into wot or it will stall. but it sounds real nice idleing. lol

 

[OBJ]

Re: evinrude 20hp 1986

We're still here hvac lookin' after your progress. That clamp must've been awful darn tight on that fuel pump nipple. When you put the new pump on, see if you got enough fuel line that you can nip off the ends. This will help the hose seal better at the connection nipples. Did you check the fuel lines? They should be plyable and not hard. Replace any that have gotten hard.