Help 1963 18hp evinrude fastwin

[Casperjjt]

I have a fastwin that has not been run for several years upon trying to start it we found it had no spark my son pulled the coils and they where rotted I bought new coils but since my son was not around I had to install my self I set them up as per another post in this forum I now have spark but the engine will not fire over we have thouroly cleaned the carb and made sure clean gas mix is reaching it. is it possible to have wired the coils wrong and still get spark? also when pulling to try and start it gets very hard to pull I am assuming that the cylinder is filling with unburnt gas raising the compresion (spins free with plugs out) I allso had the plate of that holds the points and coils to change the plug wires is it posible to have mounted this wrong? (the linkage does hook up) also is there a sure fire way to test the fuel pump? and what is the proper fuel mixture for this motor it seems to be list as 50:1 at some places and 24:1 at others

 

[crxess]

Re: Help 1963 18hp evinrude fastwin

Possible plug wires reversed?
To check fuel pump. Disconnect line at carb, pull rope. Fiel should pulse out of line.

You cleaned, but did you Rebuild the carb. New parts. Small passages cleared with a proper sized wire? All orifice plugs(jets) completely cleared of debris?

I use a set of welders files to open passages.

Motor should not try to bind up unless it is trying to fire while the piston is rising. No valves so unspent fuel is carried away on the down stroke.

 

[jbjennings]

Re: Help 1963 18hp evinrude fastwin

Is this the post you checked? http://forums.iboats.com/showthread.php?t=294072

If so, are you sure the coil laminations aren't protruding from the mounting bosses and rubbing on the flywheel magnet?
Does it get hard to turn in only one place during the turn? If so, it's probably mismounted coils as mentioned above. If you get good spark WITH A SPARK TESTER then your coils are probably on right. the armature plate pretty much only goes on one way. How does it turn over with the spark plugs out? It should turn over very easy with the plugs out, if not, something is wrong.
Good luck,
JBJ

 

[Casperjjt]

Re: Help 1963 18hp evinrude fastwin

yes that link was the post I used as refrence. and the motor spins fine with the plugs out no binding, grabing or tightness. as to the response to the other reply no we did not replace any parts on the carb just thouroly cleanes and yes all ports, passage and jets are free and clear of debri. didn't want to do a complete carb rebuild till we are certain this motor will fire over. on the carb we turned the fast and slow idle adjustments till snug then opened back up about 1 1/4 turns. If I am understanding both of your posts the engine pull rope getting hard to pull has to do with the spark ignitining with the piston moving in the wrong direction we have tried the plug wires in both positions and seems to make no diffrence. when looking at the motor from outside the back of the boat would the the right coil be the top or bottom plug. Also noticed the cam roller does not rest on the plate that moves it this plate had to be loosened to replace plug wires could this be the problem how would I adjust this properly? Thanks for your fast responses and advice so far sincerly casperjjt

 

[crxess]

Re: Help 1963 18hp evinrude fastwin

Also noticed the cam roller does not rest on the plate that moves it this plate had to be loosened to replace plug wires could this be the problem how would I adjust this properly?

If you mean the throttle roller not against the timing cam, the throttle is not opening properly.

There should be a mark on the cam about 1/4-1/2" in from the leading edge. The throttle should just start to open at this mark. Screws to adjust are under the plate.

My concern now is if you did not loosen these screws before, the whole plate assembly may be out of position.

Another concern is the flywheel not in position.

Did you re-check the Shear pin and flywheel torque? A shifted flywheel will cause binding and can cause major damage.(crankshaft end, flywheel center)

 

[Casperjjt]

Re: Help 1963 18hp evinrude fastwin

If you mean the throttle roller not against the timing cam, the throttle is not opening properly.

There should be a mark on the cam about 1/4-1/2" in from the leading edge. The throttle should just start to open at this mark. Screws to adjust are under the plate.

My concern now is if you did not loosen these screws before, the whole plate assembly may be out of position.

Another concern is the flywheel not in position.

Did you re-check the Shear pin and flywheel torque? A shifted flywheel will cause binding and can cause major damage.(crankshaft end, flywheel center)

as i said I did loosen the plate to replace plug wires one ran directly under it I will go and adjust it and make sure the roller hits at the mark. and yes the shear pin(key) and tourque on flywheel is set correctly I was an aircraft mechanic for ten years Just not a boat engine mechanic can follow simple instructions though thanks for the advise rechecking everything today will try to repost any updates and questions by 1 central time thanks again
'ccasperjjt

 

[Casperjjt]

Re: Help 1963 18hp evinrude fastwin

Horray we have a viable motor thank you all so much for your help so far. went over everything this morning and found one coil needed minor adjust ment and adjusted the throttel cam plate decided to recheck the points initally open and closed them manually to make sure they where not sticking but to day I turned the crank to watch them open and close and well one set of points was not opening at all adjusted the points reasembled checked spark, fuel pump, and plugs. all appeared in working order put the plug wires on the opposite direction that I initally believed they where suppose to be gave it one tug and it ran. mounted to 1963 16ft fiber glass terry bass boat and put it in the water it would not start in the water. took it out and it started with one pull. Note I am hoping that putting the rest of the carb plate the one that holds the adjustments and choke lever in place will remedy this. we did get it started in the water by spraying some fuel mix in the carb ran it for about an hour at diffrent speeds seems to be sound water pump worked fine and engine stayed cool to touch. it would only move the boat at top speed around 15-20 mph this is a 600lb boat and we had three adults at about 200 a piece. any how any ideas on how to make this start easy in the water your advice has been invauable so far and I would greatly appreaciate any suggestions.
thanks
CasperJJT

 

[crxess]

Re: Help 1963 18hp evinrude fastwin

Read up it the secret file - top of forum about decarbing a motor. It can increase compression by freeing everything up and sealing rings better. This could also boost vacuum and make starting easier.
My 6hp has to be choke pulled, throttle Wide open on first start. It does start after 3-4 pulls. After initial start up it works great. Until I let it set for a few days.

 

[Casperjjt]

Re: Help 1963 18hp evinrude fastwin

sorry about the delay in responding. I read the files on decarbing and plan on doing that soon the motor is running great and moves the boat a lot faster now that I have the rest of the carb and choke linkage hooked up thank you so much for all your help and advice it has been invauable. Thinking about changing the prop out next