1969 1.5 hp Johnson starting problems flooded?

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sho-bud

Cadet
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May 31, 2006
Messages
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I am very glad to find this forum. This is my first ever motor. Received it two days ago and took it out yesterday. After a few pulls it started right up and ran great for 3 or 4 10 to 15 minuet runs with some successful fishing in between. Then I started it up and got underway and it died and would not start again. It chugged a bit two times but never started up again. Any help here would be great as I am new to the whole world of motorized boating. Just to restate I checked the gas, the gas cap(air flow,) the fuel valve (open) throttle to start, choke all the way out.<br /> I do wonder about the lean/rich knob and when and how to use this and also the knob that has numbers on it?dont know what it is.<br />thanks very much guys<br />david b
 
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Paul Moir

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Re: 1969 1.5 hp Johnson starting problems flooded?

Welcome to iboats David!<br /><br />The rich/lean knob controls the fuel/air mixture in the engine at idle. It'll vary a bit with altitude and the boat it's on, but usually you just set it once and forget about it. The numbers are completely meaningless. The way it's set is with the engine warmed up and idling, turn it clockwise (lean) until you get the highest rpms, and then back it off about 1/8 of a turn rich. If it becomes hard to start or bogs a bit on accelleration, turn it a bit richer (counter-clockwise).<br /><br />I wonder if fresh fuel hasn't cleaned out the tank and clogged up the fuel filter? Start by removing the fuel line from the carburetor and seeing if you have an adequate flow of fuel to it.<br /><br />Oh, and did you try a few times with the choke open (knob pushed in)? The choke adds a lot of extra fuel to the engine and you can flood it by pulling a lot with the choke closed (knob pulled out). If you get a chug & stall out of the engine with the choke closed, you should then open the choke and pull a couple more times to clear the extra fuel.
 
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sho-bud

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May 31, 2006
Messages
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Re: 1969 1.5 hp Johnson starting problems flooded?

Great! thanks paul I will try that. I do beleive the motor has been sitting so thats a good idea. Just to clarify the knob with the numbers on it is located below the rich lean knob and is not the same knob.<br />thanks again<br />david b
 
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sho-bud

Cadet
Joined
May 31, 2006
Messages
16
Re: 1969 1.5 hp Johnson starting problems flooded?

Great! thanks paul I will try that. I do beleive the motor has been sitting so thats a good idea. Just to clarify the knob with the numbers on it is located below the rich lean knob and is not the same knob.<br />thanks again<br />david b
 
S

sho-bud

Cadet
Joined
May 31, 2006
Messages
16
Re: 1969 1.5 hp Johnson starting problems flooded?

Great! thanks paul I will try that. I do beleive the motor has been sitting so thats a good idea. Just to clarify the knob with the numbers on it is located below the rich lean knob and is not the same knob.<br />thanks again<br />david b
 
S

sho-bud

Cadet
Joined
May 31, 2006
Messages
16
Re: 1969 1.5 hp Johnson starting problems flooded?

Great! thanks paul I will try that. I do beleive the motor has been sitting so thats a good idea. Just to clarify the knob with the numbers on it is located below the rich lean knob and is not the same knob.<br />thanks again<br />david b
 
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sho-bud

Cadet
Joined
May 31, 2006
Messages
16
Re: 1969 1.5 hp Johnson starting problems flooded?

ah thanks for the tip on the choke. so if i feel i may have flooded, push the choke knob in and give a few pulls. great thank you very much.<br />sorry about the multiple posts<br />david b
 
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Paul Moir

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Re: 1969 1.5 hp Johnson starting problems flooded?

Oh I'm sorry I misread you. I should have looked up the diagram anyway. If you're interested you can have a peek inside your engine here:<br /> http://epc.brp.com/default.aspx?brands=ej&lang=e <br /><br />I described the procedure for setting the knob with the numbers. That is the idle mix control. The knob below it controls the fuel/air mixture at full throttle and it should be set first. After you get the engine started, adjust it a little rich. At full throttle (on the boat in the water) turn it lean (clockwise) until you reach the highest RPMS again and then back it off slightly. A little rich is far better for the engine than a little lean. Once that's set I usually pull the knob off and centre it, it'll never need adjustment again.<br />The adjustments affect each other a little bit, so there's a little back and forth adjustment necessary. It'll take the engine a few seconds to react to the changes, especially the idle mix changes. So make 1/8th increment turns and wait about a 10 count.
 
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sho-bud

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Messages
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Re: 1969 1.5 hp Johnson starting problems flooded?

thank you paul<br />i just fired up the motor in a bucket of water and it started right up on the first pull. i looked in the gas tank and took out a small leaf that had found its way inside. i looked at the fuel filter and it looks clear of any debris. spark plug and wire look good so i am still not sure what happened. for it to be running fine then quit and not start again?<br />thanks for the link, this will really come in handy<br />thanks again<br />david b
 
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Paul Moir

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6,847
Re: 1969 1.5 hp Johnson starting problems flooded?

Is it possible the leaf blocked up the fuel outlet on the tank? If not, go over the engine for general health. You should be able to draw a spark 3/8" long off the plug wire. The engine should be staying cool enough that you can touch the block (though probably not the spark plugs or the plate on the port side of the block as they'll likely burn!). A safer test is to dribble a little water on the head where the spark plug screws in and see if it sizzles. If it does, it's too hot. But that's probably not all that easy with the tank there, so just do your best. <br /><br />Actually, on any outboard the water pump that supplies the engine with cooling water must be serviced every few years. It's a dead simple operation on your outboard so if your at all handy with tools I encourage you to do the service yourself. You'll need to pick up or borrow a manual from the local library, but there's not much to it.<br /><br />But an overheating problem doesn't sound too likely to me. Normally you'll quit while running rather than after you've stopped for a while.<br /><br />You're mixing oil with your gas right?
 
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sho-bud

Cadet
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May 31, 2006
Messages
16
Re: 1969 1.5 hp Johnson starting problems flooded?

Yes I am mixing in oil. To be clear here, the motor was running for two minutes (after it had sat for 20 minutes) and then quit and would not start and this is all after it performed several ten minute jogs ealier.<br /> I do have a question about the cooling system. I am not sure where the intake and exhuast is. When I put the prop in the bucket and started her up, there are four 1/8 holes on the backside of the shaft about half way up. It felt like these holes were trying to push out air? but very little if any water. Is this the exhaust? thanks again<br />david b
 
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