Please help! Johnson 110HP Engine Troubleshoot

deltaking

Cadet
Joined
Aug 17, 2008
Messages
15
Hello, I am new to outboards, just bought my first boat a few weeks ago. An 89 Stratos F/S w/Johnson 110HP V4 VRO. Need help to troubleshoot motor. Took it out several times without major problems. Being a newbie and all, the first time took it out I forgot to plug the drain plug on and flooded most of the boat. Will never forget that again! Most times it will take 2-3 attempts before the engine will start. I added fuel cleaner and sprayed carb cleaner to clean the carb. Now it starts up in 1-2 attempts. I got comfortable and felt that I can trust the engine since it runs just fine after that cleanup.

Friday evening went out a couple miles in the ca delta and ended up dead on the water. Engine was running fine that day however just before I got to my destination while slowing down, the eingine started to run foul. Sounds like sparks misfiring?? and then I could not go full speed anymore. It started bogging down. Tried putting in nuetral and reving it up to clear the engine but doesn't work. Put it in gear and tried to go forward again but no good. I felt something was wrong so kept engine running slowly for a couple minutes until reach my fishing spot. Then turned motor off. Ran around on the trolling motor for an hour or so and tried to start main engine but now motor would not start. Engine turns but will not start.

It keeps cranking but won't start. Tried many attempts, choked, nothing works. Checked s/plugs for spark and yes there is spark on all 4 wires. Took off s/plugs and cranked engine because maybe engine is flooded from all the start attempts. Cranked and fuel keeps spitting out from inside the s/plug holes from the bottom 2 cylinders. The top 2 cylinders are not spitting out fuel like the bottom 2. Had another set of s/plugs so tried changing out the s/plugs with the new set after letting engine sit for 5 minutes and still won't start. Checked fuel line, oil line, pumped all to make sure they are tight. Engine cranks but still won't start. Gave up and called a friend to tow me back 1:00AM !!! What a friend, thanks.

Next day, opended up engine cover and I see alot of new fuel/oil around the area under where the VRO unit is and round the top of the lower unit. What could be the problem? Any help is appreciated. First thing I am going to do is compression test all cylinders. What else should I check? Thanks for reading all this.
 
D

DJ

Guest
Re: Please help! Johnson 110HP Engine Troubleshoot

First thing I am going to do is compression test all cylinders. What else should I check? Thanks for reading all this.

That's #1.

#2. is find out where all the fuel/oil mix is coming from. Check the fuel lines, under the hood carefully.
 

deltaking

Cadet
Joined
Aug 17, 2008
Messages
15
Re: Please help! Johnson 110HP Engine Troubleshoot

OK, compression is 90 +/- 2 across. Looks to be fine, couldn't warm up engine of course because won't start.

Oil looks to be leaking from the oil line going up to the VRO unit. One clamp on that line is missing. But that shouldn't be the reason the engine is not starting??? Right?
 

deltaking

Cadet
Joined
Aug 17, 2008
Messages
15
Re: Please help! Johnson 110HP Engine Troubleshoot

I also have something to add that could be the possible culprit. My tachometer, fuel gauge, is dead when i bought the boat. The speedometer works but on the day my engine would not start, it didn't work initially until 10-15 minutes later after I got on the water.

Could this be a rectifier problem? Would a bad rectifier cause starting problems?
 

HighTrim

Supreme Mariner
Joined
Jun 21, 2007
Messages
10,486
Re: Please help! Johnson 110HP Engine Troubleshoot

Test the rectifier as per Joe Reeves instructions in the FAQ. That could be the reason for the faulty tach, and the outboard should not be run until this is determined.

As far as the speedo, your pitot tube was likely restricted, then cleaned itself once on the water. The fuel gauge is unrelated to either. Your gauge may be faulty, or the sender on the tank, which is usually the case I have found. They are easily tested.
 

CharlieB

Vice Admiral
Joined
Apr 10, 2007
Messages
5,617
Re: Please help! Johnson 110HP Engine Troubleshoot

Fuel leaks can be dangerous and are your very first priority.

Pump the primer bulb while observing carefully for leaks, replace lines, fittings as required. Next, remove the air silencer, again pump the primer bulb while observing the carb throats for carb flooding. Your description of massive fuel from the lower cylinders is an indication of flooding.
 

deltaking

Cadet
Joined
Aug 17, 2008
Messages
15
Re: Please help! Johnson 110HP Engine Troubleshoot

1. I pumped the primer bulb from the fuel line and noticed fuel coming out of the carbs. Opened the cover and saw that fuel was pushing through 2 little holes right under the butterflies in both bottom and top carbs as I am priming the bulb. There is another hole between the two carbs that fuel is pushing out of as well. Is this where the fuel line connects to the carbs?

2. Checked the primer soleniod and looks fine, no leaks. Is this the reason why I can't start my engine or is this normal? If yes, what do I need to do? Carb rebuild? Replace fuel lines? Primer solenoid replacement? Or can I adjust the carbs to push less fuel so it doesn't flood?

3. Also noticed that after a day of sitting, if I try to cold start the engine again, on the first try it will almost start, but then dies after a few black puffs of smoke from the exhaust.

4. I've also put new s/plugs in all 4 cylinders and even after many attempts to start, the plugs look brand new. No fuel/oil, carbon, black stuff on the area where it should be sparking. I tested each plug wire and each of them creates a blue spark when cranking. However, does this mean that I'm not getting enough power from the plugs to ignite?

I'm trying to tell you details of everything to help you understand what has happened so far.
 

Dhadley

Supreme Mariner
Joined
Feb 4, 2001
Messages
16,978
Re: Please help! Johnson 110HP Engine Troubleshoot

Testing for spark with all that fuel around can lead to some exciting moments.

You did the #1 thing, compression test. That being OK your next task is to removes and clean the carbs. They need to be soaked and have new kits installed. Then the motor should start just fine.

The #3 thing to do on a new-to-me motor is a new water pump assembly. Change the gear oil while you're there.

Take the next 2 steps and do them correctly and your friend will be greatful.
 

deltaking

Cadet
Joined
Aug 17, 2008
Messages
15
Re: Please help! Johnson 110HP Engine Troubleshoot

Just found out the reason why the fuel was coming out from the carbs when I was pumping the primer bulb was because the manual valve (red adjustment lever) was turned out. It was turned almost 180 degrees of where it should be.

I read a post in here that said the correct adjustment valve should be pointing towards the unit. After turning it to point at the unit, now pump the bulb and no more leak. Should i still repair the carbs?
 
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