1970 evinrude 115 - cdi pulse pack shortens out starter?

[Cschwope]

First post for me on this forum-total newbie to boats and outboard motors.

I got this 1960 glasspar boat with 1970 evinrude 115 for free… was hoping to get it on the lake before the summer is over.

Previous owner did some work on the motor - theres new hardware on one cylinder head and new gasket. But still old pistons in it. I assume just a gasket replacement?

Brand new spark plugs-never fired-suspicious,

Sprayed some lube in the cylinders, hooked up muffler, did compression test. They are all around 95-105.

Checked for spark, couldn’t get any.

Measured rectifier, was bad-replaced
Stator resistance ok-i know it doesnt need it to start.
Optical sensor in distributor measure 5.4 ohms, gapped at .028-ok
Shift diode tested - ok
Reverse spring on crank is free not shortening out - ok
Input voltage for pack 9.6V-ok
Output voltage with DVA -0 V
It does have the ignition safety switch eliminated.


I assumed is the pack - or some stop/kill circuit i dont see on the wiring diagram.

The starter is turning the engine over just fine.. just no spark.

Decided to go with the cdi electronics pulse pack what comes with new coil.

Hooked it up, tried to crank, but just a short “sparky” sound from the solenoid. After that just silence… no cranking , no sound, nothing. Lost 12V on the + starter terminal !!?? After waiting a while i can repeat this sparky sound.

With the power pack unplugged i can crank the engine and it turns over.

With the starter unplugged on output side of solenoid i get the solenoid to engage repeatedly. But as soon as i connect starter and pulse pack together, just a sparky sound and loose of voltage.

Im thinking of running new battery cables? Maybe the ampdraw with new power pack and starter is too much? Cable worn somewhere? I assume this older starter ( looks original ) draws more amp than a new one? I just dont understand how i can loose voltage , the cables are running straight to the battery. ( battery stays at 12.7 - 12.9 V )

Battery is a new class 24 marine deep cycle.

Is there any other fuse beside the inline 12V?

Any help/ideas appreciated.

 

[racerone]

Do the following.----Get 1-5/16" socket on flywheel.-----Remove sparkplugs.-----Turn key to on.----Turn flywheel and check for spark.

 

[Cschwope]

Do the following.----Get 1-5/16" socket on flywheel.-----Remove sparkplugs.-----Turn key to on.----Turn flywheel and check for spark.

I will try that.. thanks for the quick reply..

 

[Cschwope]

Do the following.----Get 1-5/16" socket on flywheel.-----Remove sparkplugs.-----Turn key to on.----Turn flywheel and check for spark.

Got to it today… and got a bright blue spark on spark gap tester. (1/4-3/8 gap) on all 4 plugs.

 

[jimmbo]

If fuel making it to the Carbs, and then to the Main and Idle Circuits? Try Spraying a Bit of Premix into the Carbs.

 

[Cschwope]

If fuel making it to the Carbs, and then to the Main and Idle Circuits? Try Spraying a Bit of Premix into the Carbs.

Unfortunately im not at that point - yet.

Problem is:

Pulse pack and starter hooked up- it wont crank/solenoid wont engage, just one buzzing sound then silence. Loosing 12V on terminal.

Pulse pack disconnected - starter spins engine just fine.

Turning crank by hand- spark

Just doesnt work together.

 

[jimmbo]

I assumed you had Cranked it when you verified Spark.
Here are a couple diagrams of the Ignition Wiring

 

[racerone]

Take starter apart for inspection.-----Do ohm checks.

 

[Cschwope]

Just an update-
Finally get spark when pulse pack and starter are connected at same time.

Battery cables looked old, but ok. But one must have been bad - i assume ground. Could handle starter hooked up to crank the engine or the pulse pack connected to get spark by turning crank by hand - But not together.

Put new cables on it - its cranking with spark. Now lets see if she starts.

 

[Nordin]

Bad connections at the battery will cause the 12V to drop low and if the power to the ignition drops the ignition system would not work.
Newer ignition systems that are self energizing does not affect if the 12V drops but if the starter do not turn with good RPMs.
That is why it is important to have a good battery and good connections.

 

[Cschwope]

Bad connections at the battery will cause the 12V to drop low and if the power to the ignition drops the ignition system would not work.
Newer ignition systems that are self energizing does not affect if the 12V drops but if the starter do not turn with good RPMs.
That is why it is important to have a good battery and good connections.

Yes, definitely… even an intact looking old wire. Not sure how long the motor was sitting, probably for years. But started right up, sounds pretty healthy beside a small waterleak from the “top” cover. At least i know the water pump is working. Thanks for advice and tips from you guys.

 

[racerone]

You need to install a new impeller now.-----Or test the overheat warning.-----If the control has a light for overheat I strongly suggest changing to or adding a buzzer.

 

[Cschwope]

You need to install a new impeller now.-----Or test the overheat warning.-----If the control has a light for overheat I strongly suggest changing to or adding a buzzer.

Yes, i do have a new impeller what i will install. It never got hotter than to the touch. It was a small leak from the gasket. Is the pee hole towards the back of the engine? Or front… away from the prop. Consistant stream of warm water.

 

[tphoyt]

Take the good advise and Install the impeller now. Don’t wait any longer.
If the motor has been sitting around the impeller could be dried out and it if breaks up it could cause bigger problems with blocking passages.
It may be fine but why take that chance especially if you already have a replacement on hand.

 

[racerone]

Add the buzzer if you have a 1970 control box

 

[Cschwope]

I will take your advice. I will install the new impeller, the trailer was last registered in 02, the boat tag says 95. I bet i will come across more worn out and weathered rubbers, plastics, gaskets. And i will add a buzzer and check the overheat circuit.
Thank guys. Awesome forum..