Non starter Evinrude Junior 1.5

[Greenwichsmallboats]

Hello,

I recently bought an evinrude junior 1.5 and came on this forum to find out how to fix the recoil cord. Thanks to your help I was able to replace the spring and get the starter recoil working.

I once more need your help to get the engine working. The seller told me that : Last year the engine had a new coil,set of points, condensor, plug, carb rebuild and an impeller.

The problem is that I keep on pulling the cord and the engine won't fire not even an attempt at starting!

I checked the plug and it does spark.... what are the steps that I need to take to get this engine working? Adjustments of the carburator, etc.. There are 2 screws -what are they fore (bottom one, top one) ???

Thanks for your input.

 

[hardwater fisherman]

Re: Non starter Evinrude Junior 1.5

you might want to clean the carb. the top valve is the slow speed, and the bottom is for high speed.

 

[Greenwichsmallboats]

Re: Non starter Evinrude Junior 1.5

Hi,

Thanks, I managed to get it going by spraying fuel directly in the carburettor and it kept on going but it still need adjusting as I need to repeat the process each time I want to start the motor!

If, I were to close both valves, how much turn do I need to open each one for the motor to run smoothly?

 

[hardwater fisherman]

Re: Non starter Evinrude Junior 1.5

look in the top secret files, it is the first thread in this forum. look under the heading how do i adjust my carbs.

 

[Greenwichsmallboats]

Re: Non starter Evinrude Junior 1.5

Ok, thanks

 

[Joe Reeves]

Re: Non starter Evinrude Junior 1.5

The carburetor may require cleaning and rebuilding.... not a major operation.


(Carburetor Adjustments - Two Adjustable N/Vs)
(J. Reeves)

Initial settings are: Bottom high speed = seat gently, then open 1 turn out. Top slow speed = seat gently, then open 1-1/2 turns.

Setting the high and low needle valves properly:

NOTE: For engines that DO NOT have a shift selection, obviously there is no NEUTRAL position. Simply lower the rpms to the lowest setting to obtain the low speed needle valve adjustment.

(High Speed) Start engine (it will run pretty rough), shift into forward gear, take up to full throttle. In segments of 1/8 turn, waiting for the engine to respond between turns, start turning in the bottom high speed needle valve. You'll reach a point whereas the engine will either start to die out or spit back (sounds like a mild backfire). At that point, back out the needle valve 1/4 turn. Within that 1/4 turn, you'll find the smoothest setting.

(Low Speed) Slow the engine down to where it just stays running. Shift into neutral. Again in segments of 1/8 turns, start to turn the top needle valve in. Wait a few seconds for the engine to respond. As you turn the valve in, the rpms will increase. Lower the rpms again to where the engine will just stay running. Eventually you'll hit the point where the engine wants to die out or it will spit back. Again, at that point, back out the valve 1/4 turn. Within that 1/4 turn, you'll find the smoothest slow speed setting.

When you have finished the above adjustments, you will have no reason to move them again unless the carburetor fouls/gums up from sitting, in which case you would be required to remove, clean, and rebuild the carburetor anyway.

 

[Greenwichsmallboats]

Re: Non starter Evinrude Junior 1.5

Thanks, I will have a go at it.... It worked for a while so there is no reason why it should not again!!!

 

[Greenwichsmallboats]

Re: Non starter Evinrude Junior 1.5

Hi,
I was told over the phone by an outboard service centre that "the gum that has been sitting in the carburetor probably soften up because I had the engine running for a while and that it has now blocked the jets"

If that is the case, how do I fix the problem? Rebuilding the carburetor? will I need new parts?

 

[Joe Reeves]

Re: Non starter Evinrude Junior 1.5

Yes, clean and rebuild the carburetor with a new carburetor kit. It's not a good idea to take one apart, then replace the old parts.

Then, adjust as stated in my reply #6.

 

[Greenwichsmallboats]

Re: Non starter Evinrude Junior 1.5

Hi,

Yes, I will have a go at it. How do you remove the lower cowling on the engine to access the carburetor/dismathe the choke from the front panel?

 

[Greenwichsmallboats]

Re: Non starter Evinrude Junior 1.5

I have in the meantime removed the bottom of the carburetor (it is still attached to the motor) and it was clean. The float was also moving freely. The problem must then be with the jets. How do you clean them?

 

[Joe Reeves]

Re: Non starter Evinrude Junior 1.5

There are no fixed jets on that engine.... it has the adjustable needle valves that adjust as per my previous post #6. Just make sure that all of the fuel passageways are clean.

 

[Greenwichsmallboats]

Re: Non starter Evinrude Junior 1.5

ok, I will keep at it! Thanks for your help.

 

[Greenwichsmallboats]

Re: Non starter Evinrude Junior 1.5

One more question, if the plug get cover in fuel l(it does spark), then surely the fuel must past through the carburetor. so, the problem must be with the adjustments???

 

[Greenwichsmallboats]

Re: Non starter Evinrude Junior 1.5

I removed the bottom valve entirely and fuel came through - there was a bit of grits on the threads which I cleaned.

I did the same to the top valve but no fuel came through and there was no grit on the thread.

Should fuel also leak out of the top valve?

 

[Joe Reeves]

Re: Non starter Evinrude Junior 1.5

The fuel is in the float chamber only. Due to gravity, the fuel drops and runs out the bottom needle valve assembly hole only.

If you have compression, fuel and spark, the engine has to fire... possibly not run to misadjustments of the needle valves BUT it should fire. If it does not, one of those three key items is not as it should be.

 

[Greenwichsmallboats]

Re: Non starter Evinrude Junior 1.5

Thanks, I will keep at it, I managed to get it going after fixing the recoil cord so it ought to go again!

 

[Greenwichsmallboats]

Re: Non starter Evinrude Junior 1.5

Thanks, I will keep at it, I managed to get it going after fixing the recoil cord so it ought to go again!

I am at a lost as what to do next!

I took the carburetor apart and it was clean, the float move freely and the are is a spark from the plug (I took it out aatnd cranked it) I took both valves out and cleaned then.

There is gas on the plug so it must get through...

Should I buy automotive starting fluid and try to start it with that?

 

[dkonrai]

Re: Non starter Evinrude Junior 1.5

dont use starting fluid on a two stroke. it will dilute the oil in the gas and that is all bad.

there must be something blocking the fuel flow. the jets are small on those carbs, so make sure the orifices are clear. there is a plug on the top of the carb, use a punch to make a small hole, then pry it off. there are some small openings that must be cleared out. you stated there was some crud in the carb so im guessing some got stuck somewhere. also make sure the lower jet is clear. i had a 2hp that the jet kept clogging. it turned out the tank was dirty and kicking up small particles that plugged the carb.

i assume the motor has a built in tank? did you check to see if the tank is clean? there is a filter that might be clogged as well (it sits in the tank i believe) also make sure the fuel lines are clean too.

hard to diagnose over the internet. i think its fuel related as you have spark. ever take a compression test? that would help too.

good luck and keep us posted.

dino

 

[Greenwichsmallboats]

Re: Non starter Evinrude Junior 1.5

Hi,

Thanks for your input, I have no gauge to test compression but I could take the carburetor apart once more and check it again. I will take it to my local garage and blow air into every orifice ... that might clear it!

I know that the feat valve is clean as I can see the needle coming through as I screw it in, the fuel goes in OK, but I can only assume that the needle path for the idle adjustment is also clean as I can see the path. The only other part that I have identified that carry fuel is the path that goes through the float..

However, since fuel reach the spark plug and the the plug spark should make the engine fire even if the idle or fast adjustments are a bit off...

I am struggling to find a solution!!! Any suggestions are welcome.