62 28 hp evinrude wont start

[chadchappell]

I bought this motor at the end of last season. it ran great for a while then at the end of season started to die at anything over 1/2 throttle. this year it won't start/run. (I did fill it up with new gas) i got spark (put in new plugs). i disconnected the fuel hose from pump to carb and turned over, fuel was shooting out. took carb apart (it was pretty clean) cleaned again, put in new float, valve & seat, still won't start. it won't even "pop". it will run on starting fluid....I am lost with this motor now, any help will be apreciated...

 

[1946Zephyr]

Re: 62 28 hp evinrude wont start

Did you by chance get a look at how the coils looked? If the insulation is cracked, they will still deliver a spark, but may not run. It still sounds like you may have a fuel issue if it runs on starting fluid. BTW, don't use starting fluid on these. There is no lubrication. Better to use a spray bottle with fuel mix in it. You may have to disassemble the carb and soak it in carb cleaner and blow all the passages out clear with an air nozzle. I've seen perfectly clean carbs fail and sometimes it's because they're clogged at the float needle assembly or in the jet passages.

before you do a teardown of the carb, remove the high speed needle and see if fuel drains out.

 

[tootallofwa]

Re: 62 28 hp evinrude wont start

I have one too. I just got mine and it runs pretty rough. I still need to rebuild my carb.

The things we need to do to revive an old motor include...

1) Check compression FIRST! Compression really should be above 90psi (my opinion) in each cylinder and within 10% of each other.

Mine is 90/85psi which is marginal. In order to improve compression I am going to De-Carb. http://forums.iboats.com/showthread.php?t=158076


2) Check Ignition at each cylinder (spark). Spark should jump a 7/16" gap. (so they say...) Points should be gaped @ .020" and be clean and shiny. Plugs should be gaped @ .030".

I haven't checked my points or how good my spark is yet, but it does run, somewhat. My WOT doesn't seem very wide open and I can't get mine to Idle very low. (I want to troll, and I need long idle time.)

3) Check Fuel... If your pump is pumping and your engine is starving, you either have a blocked fuel passage or no vacuum. (no compression... no vacuum.) Check the vacuum line to the "cut out" switch for leaks. Low vacuum could be caused by bad butterfly valves... (probably not.)

If your flooding... the low idle needle is worn or the float valve won't seat.

(I NEED TO REBUILD).

4) Synchronize... The ignition needs to be sync'd with the carburetor. linkage needs to be adjusted so the carb does not get ahead of the spark or vice versa. There is quite a bit of spark advance to get the wide rpm range of 500 to 5000 on a 2-stroke and it has to happen when the throttle is in the right position. I did it on my 63' 40hp and it was easier with the flywheel off.

(I gotta do this too).

Good Luck...

 

[chadchappell]

Re: 62 28 hp evinrude wont start

I am planning on checking the coils tonight. I'm not a mechanic but I'm figuring something with the fuel because it runs with fluid. most of what I've done is just by reading info of here and common knowledge. I don't know how to sync or do a compression check. I'll also try soaking and blowing out the carb again tonight, along with readjusting the float.

 

[tashasdaddy]

Re: 62 28 hp evinrude wont start

lots of help here. http://forums.iboats.com/showthread.php?t=299680

 

[tootallofwa]

Re: 62 28 hp evinrude wont start

I am planning on checking the coils tonight. I'm not a mechanic but I'm figuring something with the fuel because it runs with fluid. most of what I've done is just by reading info of here and common knowledge. I don't know how to sync or do a compression check. I'll also try soaking and blowing out the carb again tonight, along with readjusting the float.

You're shooting your self in the foot without a book!
I've got Seloc's 56-70 johnson/evenrude repair manual. It's OK but the factory service manual may be better. I think it's available here @ iboats.

compression checks are easy. You just need the tool. screw it in the spark plug hole, crank the engine 3-4 or so revolutions, read the gauge, release the pressure on the gauge and do it again.

Synchronizing is simple too, but you need the book to show you how.
There is a LOT of info in my book. (the whys and wherefores.)

OR... Pay someone else...
Good Luck