Johnson HP 40, 2002 solenoid, primier system problem

[LTA]

Hi forum. This is LTA again. Could somebody fill me in what is the main solinoid's (primier system) function? Our engine is having problems because of this thing and we cannot seem to understand what is it there for at all? When we move its' lever a little the engine starts to spit and jump and move and dance and do all the tricks. ;-)

 

[OBJ]

Re: Johnson HP 40, 2002 solenoid, primier system problem

No problem LTA....<br /><br />The primer takes the place of the old choke plates. When you push in on the key, the primer shoots gas into the throat of the carb for cold starts. The red lever your twisting is the manual feature. The normal position is straight back. Turn it to the side for manual priming.<br /><br />That's why it spits and coughs when you turn the lever. Engine is getting to much gas.<br /><br />Hope we've helped. Don't hesitate to post anymore questions.

 

[LTA]

Re: Johnson HP 40, 2002 solenoid, primier system problem

Thanks for giving us some more pointers OBJ. What do you mean by saying straight back? Clockwise? Is it like up and a little back? When this lever is in this position the engine is simply choking from being run too fast even though we do not touch any accelerators or anything. But when we put this lever to another position that is like downwards (contr clockwise)the engine stops after a while by itself and we do not touch anything here either. Any ideas what seems to be the problem? Can we just disconnect this thing and put aside?

 

[rickdb1boat]

Re: Johnson HP 40, 2002 solenoid, primier system problem

I'd remove and clean the carbs out. Might be a blockage in one of the jets or a float is sticking. You should never have to move that lever, unless the electric primer fails. You can verify this by having someone push the ket "IN" & "OUT". while the ignition switch is in the ON position(Not Started) and see if you hear it click<br /><br />

 

[Cricket Too]

Re: Johnson HP 40, 2002 solenoid, primier system problem

LTA.....When you put the primer in the up(clockwise) position it runs fast beacause it's almost like you ARE touching an accelerator, your giving it more gas, if you leave it like this it should stall out. When you said you put the lever down(counterclockwise) and, "the engine stops after a while", did you mean it stops running rough or stops running altogether? It should not stall in this position it should run normally in this position, if it is stalling in this position you might need a carb rebuild, like RB suggested. It's not doing it by itself, it's doing it because you are touching the primer and giving it extra fuel and then taking it away. Good luck.

 

[DHPMARINE]

Re: Johnson HP 40, 2002 solenoid, primier system problem

RB ..Fantastick picture of the primer solenoid.How did you do that?<br />DHPMARINE

 

[OBJ]

Re: Johnson HP 40, 2002 solenoid, primier system problem

Good pic Rick....says in a pic what takes several dozen words. Almost worthwhile to take some shots of an engine and store them away for reference on some of these post. Makes it a lot clearer.

 

[rickdb1boat]

Re: Johnson HP 40, 2002 solenoid, primier system problem

OBJ <br /><br />That's exactly what I did. Took a bunch of pics of the boat and more so, the motor from many different angles. Comes in handy for showing people what is what. Doesn't come up often, but sometimes it helps. Helps me too, when I get to tearing things apart and can't remember where that clamp or whatever goes. Gotta love those digital cameras!!

 

[OBJ]

Re: Johnson HP 40, 2002 solenoid, primier system problem

How'd ya' get the arrow in there Rick? Seems we might have a new type ball game here. No copyright laws involved, less typing. I like it.

 

[bubbakat]

Re: Johnson HP 40, 2002 solenoid, primier system problem

OBJ I use paint shop to put the arrows in mine<br /> I to take pic when tearing down a motor and helps this old feeble mind

 

[clanton]

Re: Johnson HP 40, 2002 solenoid, primier system problem

Check the VRO pulse hose, starter rubs a hole in the hose on some of the 40s. If there is a hole in the hose, repair the hose, and grind a notch in the starter base plate, to clear the hole. The hole will be close to nipple in the block.

 

[LTA]

Re: Johnson HP 40, 2002 solenoid, primier system problem

Hi ya everyone! Wow! I didn't even think that I would draw so much attention to our problem! Thank you very much for your help! Now to answer your postings..<br />Thanks for the picture RB! It's awsome!<br />The engine stops running rough and altogether Mmcpeck.<br />Good suggestion Clanton, but we have a brand-new VRO so I assume the problem is not in there.<br />We'll clean the carbs out first and then I'll let you all know how it will turn out.

 

[LTA]

Re: Johnson HP 40, 2002 solenoid, primier system problem

Hello guys! This is LTA again. Well, the carbs are cleaned out but it did not solve the problem though. Does anybody have any more suggestions? The VRO system is brand-new. The engine still runs a bit too fast at one solinoid's lever position and stops running at all at another position. Can we possibly disconnect it at all as this engine is used in summer only and the motor will not get cold so that the solinoid would have to help it start?

 

[seahorse5]

Re: Johnson HP 40, 2002 solenoid, primier system problem

For a quick test of the primer solenoid, once the motor is running, use needle nose pliers to "pinch off" the fuel feed line going into the primer (larger hose) and see if the motor runs better. If so, the primer is leaking internally and should be inspected or replaced.<br /><br />Also make sure there is no voltage on the primer's purple/white wire, except when the keyswitch is pushed in while in the ON position.<br /><br />Good luck.

 

[jegervais]

Re: Johnson HP 40, 2002 solenoid, primier system problem

If the primer solenoid isn't your issue, remove the idle mixture adjustment (needle) screws from both carburetors and use a caliper to measure the overall length. DO NOT put the jaw of the caliper in the screw slot when you measure. The correct length is 2.788 cm (1.098 inches). The correct needles screws have a step at the end of the threads and another step about half way to the tip. The tip is also somewhat flat. <br /><br />Two possibilities for wrong needles exist, either too long, or needles which have one smooth taper from edge of threads to tip - the last will also have a rounded tip to the needle.<br /><br />If you have the wrong needles, you will need two new ones, p/n 350802.

 

[LTA]

Re: Johnson HP 40, 2002 solenoid, primier system problem

Hello, everybody. This is LTA again with its old good problem. The carbs are cleaned out. The primer is working fine. The needles are tested and they are also fine. The VRO is brand-new. But now the motor still stops by itself at the idle run. When running at high speeds it works OK now though. What could this one mean and how do we correct it? I am totally lost..

 

[james roach]

Re: Johnson HP 40, 2002 solenoid, primier system problem

LTA how did you clean out the carbs? I still dont think they are clean. Sounds like the jet under the needle and seats are still not clean. Give us some info on how you cleaned it. "It works fine at high speeds" gave it away. There is no substitute for taking them apart and soaking them. There was a good post on this last week by someone with a 1988 V6 Johnson. Go back and read it. Good Luck.<br /><br />James