62 Evinrude Lark IV - Newbie needs HELP!

[Knotty1]

Hi there!

This site/forum is fantastic!

I recently scooped up a fantastic deal on a little 15' runabout with a 62 Lark IV 40HP (#35531) engine. I am working on it and cleaning her up, mostly cosmetic so far. Apparently the motor hasn't been run for 3 years or so. Looks all intact and clean. Hoping to test it soon. Biggest problem I have come across so far, is I can not for the life of me figure out how to tilt (or is the term TRIM) the motor down! Is this baby electric/hydraulic? Is there a manual release?

I would also appreciate anyone's thoughts, opinions, and suggestions for this motor. Again I totally new to boating. Automotive engines, no problem... this is my first boat motor!

Thanks in advance to all that can assist!

 

[lindy46]

Re: 62 Evinrude Lark IV - Newbie needs HELP!

Should be a knob on the starboard side of the transom clamp mechanism. Lift up slightly on the motor and pull the knob out. Motor should release.

 

[tmcalavy]

Re: 62 Evinrude Lark IV - Newbie needs HELP!

You adjust the angle/trim of that outboard by moving the rod/pin at the outside bottom of the transom clamp...when you lower your outboard, it engages/hooks onto the rod/pin...move the rod/pin in or out to change the angle of the motor.

 

[Knotty1]

Re: 62 Evinrude Lark IV - Newbie needs HELP!

Thanks all....
Figured it out... (tilt)

Next question... I have her pulled out and on a stand. Want to barrel test.
What are the minimum connections needed to try turn this over? Can I run battery direct to the starter?

Thanks again.

 

[bktheking]

Re: 62 Evinrude Lark IV - Newbie needs HELP!

Black cable to engine ground away from the carb or fuel, black and red to battery, choke closed, pump the primer bulb until it is hard, run the correct oil/gas mix (it's not 50:1) set the throttle to start and touch the other end of the red cable to the positive on the starter.

 

[Knotty1]

Re: 62 Evinrude Lark IV - Newbie needs HELP!

Thanks! Can't wait to give her a try... Hopefully this weekend.

 

[Knotty1]

Re: 62 Evinrude Lark IV - Newbie needs HELP!

Black cable to engine ground away from the carb or fuel, black and red to battery, choke closed, pump the primer bulb until it is hard, run the correct oil/gas mix (it's not 50:1) set the throttle to start and touch the other end of the red cable to the positive on the starter.

Hi!

I've tried turning her over, but thus far no luck - appears there's no spark at the moment... Fist thought was coil... however I'm also wondering if there is another connection I need to make (ignition??) which may be prohibiting any current from getting to the plugs. If this is the case, any clues as to which wires i should be looking for to "jump" together?

Thanks again!

 

[F_R]

Re: 62 Evinrude Lark IV - Newbie needs HELP!

Hi!

I've tried turning her over, but thus far no luck - appears there's no spark at the moment... Fist thought was coil... however I'm also wondering if there is another connection I need to make (ignition??) which may be prohibiting any current from getting to the plugs. If this is the case, any clues as to which wires i should be looking for to "jump" together?

Thanks again!

The ignition system is self powered (magneto), so no external connections are required. In fact, it you do attempt to connect an external power source to the magneto, you will damage it. If you have no spark, you need to pull the flywheel to find out why not.

 

[Knotty1]

Re: 62 Evinrude Lark IV - Newbie needs HELP!

The ignition system is self powered (magneto), so no external connections are required. In fact, it you do attempt to connect an external power source to the magneto, you will damage it. If you have no spark, you need to pull the flywheel to find out why not.

Sorry for my ignorance, but could you explain what you mean by "magneto" / self powered? If what you're saying is no "switch" is required, why would there be a need for an ignition key? Wouldn't that mean anyone could start it without the key?

Again, new to all this, so pardon my ignorance.

 

[bktheking]

Re: 62 Evinrude Lark IV - Newbie needs HELP!

From Wikipedia- In the type known as a shuttle magneto, the engine rotates a coil of wire between the poles of a magnet. In the inductor magneto, the magnet is rotated and the coil remains stationary.
On each revolution, a cam opens the contact breaker one or more times, interrupting the current, which causes the electromagnetic field in the primary coil to collapse. As the field collapses there is a voltage induced (as described by Faraday's Law) across the primary coil. As the points open, point spacing is such that the voltage across the primary coil will arc across the points. A capacitor is placed across the points to suppress the arc, set the amount of voltage across the primary coil, and to control the rate at which the electrical energy dissipates in the primary coil.

A second coil, with many more turns than the primary, is wound on the same iron core to form an electrical transformer. The ratio of turns in the secondary winding to the number of turns in the primary winding, is called the turns ratio. Voltage across the primary coil results in a proportional voltage being induced across the secondary winding of the coil. The turns ratio between the primary and secondary coil is selected so that the voltage across the secondary reaches a very high value, enough to arc across the gap of the spark plug.



Under the flywheel is the magneto, just like a lawn mower, it will run without a battery. Ignition key is for a starter system. These motors (at least most of them) had a pull start and electric start option. The front of the motor has a swing down door which reveals the pull start handle. If everything is working, you can rotate the flywheel and spark will happen, no battery required.

 

[lindy46]

Re: 62 Evinrude Lark IV - Newbie needs HELP!

Sorry for my ignorance, but could you explain what you mean by "magneto" / self powered? If what you're saying is no "switch" is required, why would there be a need for an ignition key? Wouldn't that mean anyone could start it without the key?

Again, new to all this, so pardon my ignorance.

The battery only powers the starter and electric choke. If you have an ignition key/switch, there is a kill circuit which grounds out the points when the key is in the "off" position. The motor cannot be pull started in the "off" position. If you turn the key to the "run" position, you can pull start the motor. The kill circuit is not connected to the battery. The 1950's motors didn't have an ignition switch with a kill circuit - just a push button starter. They could be pull started at any time with or without the battery installed. You "killed" those motors by choking them. I guess in those innocent times, people didn't worry about their boats being stolen like they do nowadays!