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#12509732 - 11/19/17 08:12 PM 1994 Johnson 90hp issue
joho5 Offline
Extreme Angler

Registered: 07/03/08
Posts: 2926
Loc: Abbott, TX
Ok buddies boat has an issue, trying to sort it out.

We ran it today, started perfectly...ran it for about 10 minutes max, got up to 44mph at 5100rpm. Slowed down going into a cove, cut the engine off to piddle around. Piddled around for about 15 minutes and went to start engine to leave and it wouldnt start. Hasnt started yet, wont even try. I figured it was an electrical issue and was just going to verify when we got home so pulled the plugs and turned over and all are sparking bright blue. So a fuel issue? What in the world could have happened in that short time from running perfectly, to nothing at all? We killed the engine on our own will.

Any pointers would help.

I dont have a compression tester, but almost positive the compression on the engine is fine. I can go get one tomorrow...but even if it was a compression issue, wouldnt the motor at least start, or try to?

I was totally expecting for it to not have any spark...but it wont start on muffs right now either, but spark plugs do have spark.

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#12510148 - 11/20/17 06:51 AM Re: 1994 Johnson 90hp issue [Re: joho5]
gary purdy Offline
TFF Guru

Registered: 05/24/03
Posts: 11322
Loc: Littlefield Tx & Lake A. H. US...
Fuel filter, fuel bulb or fuel line can cause this. Could be simply flooded. 1994 90hp can be a VRO or a premix type of motor. Need model number.
_________________________
The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD

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#12510311 - 11/20/17 09:33 AM Re: 1994 Johnson 90hp issue [Re: joho5]
joho5 Offline
Extreme Angler

Registered: 07/03/08
Posts: 2926
Loc: Abbott, TX
90TL motor.

Have the manual and may have possibly found problem. Manual says stator resistance should be .7 with +/- .05

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#12510316 - 11/20/17 09:37 AM Re: 1994 Johnson 90hp issue [Re: joho5]
joho5 Offline
Extreme Angler

Registered: 07/03/08
Posts: 2926
Loc: Abbott, TX
Its a 90TL model. I may have found an issue. I could have sworn the previous owner said he replaced the stator. Per the manual, my engine calls for a 9amp stator that has resistance check of .7 with +/- .05. I just checked the stator resistance and its measuring at 1.3...now there is a model in same year range 90hp that uses a 6amp stator that should measure resistance at 1.3.

So its looking like the wrong stator is on the engine...Would this cause the issues I am seeing? Basically my theory is that there is a 6amp stator on my motor and should be a 9amp. Either that, or the 9amp is not checking out correctly on resistance.

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#12510667 - 11/20/17 03:41 PM Re: 1994 Johnson 90hp issue [Re: joho5]
gary purdy Offline
TFF Guru

Registered: 05/24/03
Posts: 11322
Loc: Littlefield Tx & Lake A. H. US...
The difference between the 9amp and the 6 amp is on battery charging. You could have the wrong stator but you had spark. TL shows to be a 1993 motor with a VRO system. Pull the front air box and the bottom each side of the carbs bowls you will see a screw, remove it to see if you have straight oil or fuel-oil mix. If the vent stops up on the cap to the oil tank it will force the fuel system full of oil. Good Luck.
_________________________
The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD

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#12511615 - 11/21/17 12:42 PM Re: 1994 Johnson 90hp issue [Re: joho5]
joho5 Offline
Extreme Angler

Registered: 07/03/08
Posts: 2926
Loc: Abbott, TX
Ok...I am guessing it just was a severe flood case. I have owned several boats and this is the first time I have done this to where it wouldnt start. Maybe the primer solenoid is more aggressive in this one or something. Long story short, I couldnt figure it out, so I ran it to shop where he briefly tried starting it just to test battery. It fired right up, but he didnt use prime, choke or anything and I noticed that the unburnt mix had ran down lower unit and made its way out. I believe the haul to the shop dried it up and it started fine and I ran it on muffs 3-5 times yesterday and it started fine every time. Only difference is I dont use any choke or prime at all, and I was...and using it probably too much. This morning it didnt start by just bumping the key, so I primed a tad and bam started right up. The procedure is just a little different on this one than most I have had in the past and thats a part of getting a new "used" boat...is learning it.

Thanks for all the help and I hope this is what the issue really was. I will be able to tell in the next couple of lake trips.

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#12511671 - 11/21/17 01:30 PM Re: 1994 Johnson 90hp issue [Re: joho5]
gary purdy Offline
TFF Guru

Registered: 05/24/03
Posts: 11322
Loc: Littlefield Tx & Lake A. H. US...
Better check the enrichment solenoid. Could be leaking by allowing fuel into the intake. You should have to choke this motor when its cold or hasn`t been run for a couple of days.
_________________________
The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD

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#12511752 - 11/21/17 02:45 PM Re: 1994 Johnson 90hp issue [Re: gary purdy]
joho5 Offline
Extreme Angler

Registered: 07/03/08
Posts: 2926
Loc: Abbott, TX
Originally Posted By: gary purdy
Better check the enrichment solenoid. Could be leaking by allowing fuel into the intake. You should have to choke this motor when its cold or hasn`t been run for a couple of days.


Thanks gary...where is that located and I will check this evening?

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#12511758 - 11/21/17 02:50 PM Re: 1994 Johnson 90hp issue [Re: joho5]
joho5 Offline
Extreme Angler

Registered: 07/03/08
Posts: 2926
Loc: Abbott, TX
and the red arrow needs to be pointing in the 6:00 position?

I remember seeing that under there but cant recall where it was.

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#12512093 - 11/21/17 07:26 PM Re: 1994 Johnson 90hp issue [Re: joho5]
gary purdy Offline
TFF Guru

Registered: 05/24/03
Posts: 11322
Loc: Littlefield Tx & Lake A. H. US...
Originally Posted By: joho5
and the red arrow needs to be pointing in the 6:00 position?

I remember seeing that under there but cant recall where it was.
Yes but I have seen the valve itself leak through. Pull the little hoses off and pump the fuel bulb. If you see fuel come out the small fittings you know it`s leaking. If you feel the bulb going down holding pressure you have fuel leaking somewhere.
_________________________
The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD

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#12512636 - 11/22/17 09:09 AM Re: 1994 Johnson 90hp issue [Re: joho5]
boatman025 Offline
Pro Angler

Registered: 07/16/10
Posts: 523
Loc: McKinney
If want we could check it out next week just let me know and we can put you on Calender
_________________________
Hughes Marine Service
McKinney ,Texas

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#12512780 - 11/22/17 10:55 AM Re: 1994 Johnson 90hp issue [Re: joho5]
joho5 Offline
Extreme Angler

Registered: 07/03/08
Posts: 2926
Loc: Abbott, TX
verifying the arrow on my primer solenoid is in the correct position. This is me standing up in the back of the boat looking straight on the motor. So from that position, the primer arrow is in the 3:00 position and it can be rotated counter clockwise about 90 degrees. Just making sure this is correct...where it is now.


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#12513841 - 11/23/17 09:45 AM Re: 1994 Johnson 90hp issue [Re: joho5]
sbump26 Offline
Extreme Angler

Registered: 03/10/04
Posts: 1922
Loc: Arlington, TX
I have a 97 Evinrude 90 HP and your red indicator is correct in the picture. I have the same hard start sometimes issues. I have rebuilt carbs, changed water oil separator filter, bulb, rebuilt starter, spark plugs and replaced the red knob in the enrichment solenoid because it was cracked. Sometimes it starts right up and next time won't start at all. I think the timing is off because one time I was looking at linkage and the timing adjustment was all the way to the left. I am sure it was somewhere in the middle before. The lock nut had come loose. I put it somewhere in the middle of adjustment and while it would start sometimes and run fine the next time it wouldn't start at all. If you figure it out post up what the cause is smile
_________________________
Put the plug in.

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#12513861 - 11/23/17 09:54 AM Re: 1994 Johnson 90hp issue [Re: joho5]
sbump26 Offline
Extreme Angler

Registered: 03/10/04
Posts: 1922
Loc: Arlington, TX
Note I have tried the "proper starting" procedure by turning key and holding in for 8 seconds then starting. Sometimes this works others it seems to flood it. Next time out I can just bump the starter with out doing it and it will start right up, next time it won't. The problem is you don't know what it wants that day and it won't start. That unreliability is very aggravating and keeps me from going to other lakes because you just don't know what's going to happen at the ramp. And starting in the driveway first is very misleading. Sometimes that doesn't help. I have a lake down the street so loading up and going a short distance is better than going to a farther lake.
_________________________
Put the plug in.

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#12513867 - 11/23/17 09:57 AM Re: 1994 Johnson 90hp issue [Re: joho5]
sbump26 Offline
Extreme Angler

Registered: 03/10/04
Posts: 1922
Loc: Arlington, TX
Also, when you can get it started it seems to run fine all day and starts right up. It will push my 16' fiberglass boat 38MPH trimmed up. RPM's about 5200 at WOT.
_________________________
Put the plug in.

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