Johnson 25 pumps water but stops

[BWilkerson]

Have a 1983 Johnson Seahorse 25 I just got. I wanted to test it out at home before I took it to the lake..

I learned that muffs dont work on this gearcase so I grabbed a big cooler and started it up....

Problem I'm having is it squirts water out of the pee hole when I first crank it, but then will stop after a few seconds...

Also read something saying the water level has to be above the pump because its not self priming but im not sure how far up it is..

Could I just not have it deep enough??? emoBang

 

[Bubbakat]

You don't have it deep enough in the water. Try a deep garbage can up to the middle under the motor a short distance.

 

[wrechin2]

Follow what BubbaKat said and you should be fine. Be careful or you will kill the pump and have a lot more to worry about.

 

[BWilkerson]

Ah that was the problem....Tried it again right after I posted this and its whizzin like it should...

Took it to the lake today for a test spin however and it has a small miss and at about 1/3 throttle it tries to die. Almost like it runs out of fuel. Any ideas on that?

Thanks guys

 

[buzz]

Just a idea. But are you sure that all the gas is FRESH. Nothing in the tank from the previous owner?

 

[BWilkerson]

Nope. I emptied it all the old gas out into our lawnmower jugs. My old man said he put it in his mower and it refused to run..

But all the gas in the boat tank is now brand new....It's been runnin probably a total of 30 mins.... Would that be enough to have ran the old gas out of the fuel bowl and lines??

 

[buzz]

Probally. But wrenching would know for sure. If it's got a bowl...that you can remove.....do that and clean it real good. Lots of crap can accumalte in the bowl. I had this problem once.....by not running out or pouring out the old gas.

 

[BWilkerson]

Found out it has the wrong plugs in it... Gonna grab the right ones tomorrow. Not sure if fire would have anything to do with the problem, but I don't think it'll hurt buyin the plugs that belong in it...

 

[wrechin2]

Plugs can't hurt especially if they are incorrect. May have some varnish in the carb causing fuel issues. Add some carb cleaner to your tank like Berryman's B12 or sea foam and it make take care of it. If not, it may need the carb rebuilt. The fuel pump may have holes in the diaphragm causing fuel delivery issues as well. Just a few thoughts.

 

[BWilkerson]

Well i took it back out today to try to run some b12 through it and it died at the end of Ware Branch! Just died and refused to start back! Rowed my way back to the ramp finally and got her home.

I checked the fuel pressure going into the carb and it's gettin 3 - 3.5 lbs. I tried finding some information on correct fuel pressure but I can't find anything.

 

[wrechin2]

How did you test fuel pressure if it is not running??? emoScratch Usually around 3-4 PSI at a idle and around 1.5 at WOT. If you have fuel in the carb it will run. It does not need pressure to run like a EFI system. Where you idling or running hard when it happened?

 

[BWilkerson]

Pulled the fuel line from the bottom of the carb, stuck a vacuum tester in the line and turned the motor over for a couple of seconds. I was seeing if it was pushin any fuel to the carb at all.

I was around half throttle when it died.... We had just backed up from a dock. Told my g/f I wanted to ride around a few minutes let the b12 work its magic....got about 1000ft and that was it....

Didn't make any strange noises, no knocks clacks or whams...it just died....

Motor turns over like it should with no funny noises. Lord knows I would've heard... I cranked and prayed and cranked before I sucked it up and grabbed the paddle lol emoLaugh emoLaugh emoRedface emoRolleyes

 

[wrechin2]

The carb may have trash or heavy varnish in it that has plugged off the jets. To see if it is a fuel issue, take a can of carb cleaner and spray just a little , push down then let off of the button, into the carb. If the engine hits or starts, then the carb is probably full of crap. If it still doesn't hit/start it is a electrical issue that can range from a bad ignition switch to a stator. It is more than likely a fuel issue. Let us know what you find! emoToast

 

[BWilkerson]

Shot some carb cleaner in it and gave her a crank... nothing. Guess that narrows it down to a fire problem...

I got a buddy who's gonna let me borrow his manual. Time to bust out the ohm meter!

 

[wrechin2]

It takes more than a OHM meter to fully test the ignition. It takes a peak voltage adapter to measure the voltages that each component produces. Here is a troubleshooting guide for you. It lists the resistance and voltages. I have seen stators pass a ohms test and fail a DVA test. Hope this helps!

Here is the file.....