Lets talk timing, linkage, and operation Johnson Evinrude

[Steve135]

Hi,I am a bit confused on operation of the timing and the way it advances? The linkage is conected to the throttle quadrant and moves when the throttle is advanced? But does this happen only in gear? Does is only have linkage to move it? <br />And can you move it manually at idle and listen for engine burps and cough to see that the sensor is still good and not shorted or bad?<br />I am just looking for other reasons for the loss of power when I put the engine in gear. <br />Just stalls out.From previous post I over heated the engine. I have since put new head and exhust gaskets on and new T-stat and pressure relief valves in. I am now doing the intake, carbs and fuel lines. I know if the timing isn't working correctly the engine won't run under load either.<br />The engine is a 1984 Evinrude 70 hp 49 cid<br />I checked the linkage and the timing plate advances with throttle movement. But it doesn't go all the way to the stop. This is with the engine not running.<br />steve

 

[Capt. Bob]

Re: Lets talk timing, linkage, and operation Johnson Evinrude

It advances by linkage...in gear or not. You should be able to see that.

 

[Joe Reeves]

Re: Lets talk timing, linkage, and operation Johnson Evinrude

Possibly I've overlooked it, but I can find no mention of what year engine this pertains to.

 

[Steve135]

Re: Lets talk timing, linkage, and operation Johnson Evinrude

Hey Joe this is a 1984 70 hp 49 cid engine. <br />The linkage is all in place but the timing plate only moves half way at full throttle.(eng. Not running) There is nothing blocking it either I can move it to the stop.The motor ran fine till I overheated it! Every gasket has been replaced and T-stat and pressure relief valves repalced.Now I can't keep it running in gear in the water! Runs fine on the ears in the driveway? Does anyone think I could have cooked the carbs and the floats are sunk? I read that the gas in the bowls gets to 200 degees when the engine is turned off after a long run? I think my overheat was about 200 plus and then the engine quit. Temp.had to keep climming after that? <br />(Nevetsd@aol.com)

 

[Hooty]

Re: Lets talk timing, linkage, and operation Johnson Evinrude

Help me here Stinky. Are you saying you can rotate the timing ring by hand to the stop but the throttle arm won't move it that far?? <br /><br />c/6<br /><br />Hooty

 

[Joe Reeves]

Re: Lets talk timing, linkage, and operation Johnson Evinrude

If you've changed nothing, and the linkages are as they were previously, and the timer base advanced to the full spark advance setting previously etc... I think you're saying that even though you can obtain a full throttle setting (butterflys completely open), the timer base is sticking at say, the halfway spark advance point.<br /><br />If so, due to overheating, it's possible that the nylon retaining bearing ring has melted somewhat and is binding the timer base. It is also possible that the stator assy under the flywheel is melting down, dripping a sticky substance on the timer base and the retaining ring which will also cause the timer base to stick.<br /><br />Ahhh, eh, uhh.... that 1884 year is a typo I hope and you really did intend for it to read 1984? (grin)

 

[Steve135]

Re: Lets talk timing, linkage, and operation Johnson Evinrude

Joe and Hooty, Yes I can only advance it by hand all the way. This motor was running fine before the overheat! I have had the fly wheel off and pull the stator and everything looks cool.<br />The stator looks darker than I would think it should look. There isn't any driping of any goo that I can see. I ran the test on the timer base and stator. I think I am doing it right. I don't have the correct meter that they call for but I have a good electric meter. Nothing shows shorted. I haven't done the charging test yet.<br />The motor runs but hard to start in the water. Stalls in gear. Will be running motor today to see if anything has changed since doing the intake gaskets and fuel lines! Hope a barrel of water is enought resitance. I hate like **** to have to keep going to the ramp to try.

 

[Steve135]

Re: Lets talk timing, linkage, and operation Johnson Evinrude

Hey Joe Reeves Good Call! You hit it right on. <br />I found the nylon retainer ring melted about 2 inches around!<br />I haven't been able to try it yet but, sure is looking good as beeing the problem to no power in gear. Is this ring suppose to be flat with no large lips. I must have moved the throttle when it was still hot cause its pushed up like a lip in that 2 inche area. Thanks Joe for the help.<br />steve

 

[Steve135]

Re: Lets talk timing, linkage, and operation Johnson Evinrude

Hi All, I was able to get that retainer ring today at a boat junk yard. Of course I picked the Johnnyrude That was going to be a bear to get the fly wheel off but it came off with a couple of raps from the hammer! Put the ring on and took the boat to the water and it was just like new.<br />Total cost all gaskets, plugs, T-stat,presure relief valves, solinoid, battery cables, fuel line,fuel pump kit, nylon retainer ring,water pump,paint and one tool.$245.00 dollars All because that little plastic piece that holds the water pump impeller on the flat wore down from silt and sand!<br />Thanks to Joe Reeves for the find!<br />steve