Notices
The Boating Forum

Johnson 90hp (J90PLEEB) issues

Old 09-13-2020, 11:34 AM
  #181  
Admirals Club Admiral's Club Member
 
Dacman's Avatar
 
Join Date: Oct 2014
Location: Summerville SC
Posts: 9,302
Received 1,026 Likes on 776 Posts
Default Test?

[img]blob:https://www.thehulltruth.com/e2be9642-67a0-4ab6-9e92-6f7bf09507b8[/img]
Old 09-13-2020, 11:37 AM
  #182  
Admirals Club Admiral's Club Member
 
Dacman's Avatar
 
Join Date: Oct 2014
Location: Summerville SC
Posts: 9,302
Received 1,026 Likes on 776 Posts
Default Test

Did you do this test of quick start feature with a timing light?
It may be an issue on yours.
it should disengage faster than a few minutes when warmed up restart
Old 09-13-2020, 03:59 PM
  #183  
Senior Member
Thread Starter
 
Join Date: Sep 2019
Location: York, ME
Posts: 118
Received 13 Likes on 9 Posts
Default

Originally Posted by Dacman View Post
Did you do this test of quick start feature with a timing light?
It may be an issue on yours.
it should disengage faster than a few minutes when warmed up restart
Have not yet... will have to do the test in tank.
Old 09-13-2020, 04:23 PM
  #184  
Senior Member
Thread Starter
 
Join Date: Sep 2019
Location: York, ME
Posts: 118
Received 13 Likes on 9 Posts
Default

Originally Posted by 1breakinit View Post
yes , no water on the new ones , give #2 cylinder 1/2 a turn in and see how that works for you, .probably would not hurt to nip 3 and 4 out just a tad .
Cylinder 2 or 1? I ask because cylinder #1 was bone dry.
Old 09-13-2020, 05:15 PM
  #185  
Admirals Club Admiral's Club Member
 
Dacman's Avatar
 
Join Date: Oct 2014
Location: Summerville SC
Posts: 9,302
Received 1,026 Likes on 776 Posts
Default

To me , not a pro, but cylinder #1 looks like the only one that is combusting properly.
The others look flooded to me.
A nice white insulator in a 2 stroke engine raises a flag to me. JMO
They all look very oily.















Old 09-14-2020, 07:20 PM
  #186  
Senior Member
Thread Starter
 
Join Date: Sep 2019
Location: York, ME
Posts: 118
Received 13 Likes on 9 Posts
Default

Found a great video regarding how to read a spark plug.

Old 09-20-2020, 06:11 PM
  #187  
Senior Member
 
Join Date: Jul 2020
Posts: 241
Received 82 Likes on 43 Posts
Default

Originally Posted by Dacman View Post
To me , not a pro, but cylinder #1 looks like the only one that is combusting properly.
The others look flooded to me.
A nice white insulator in a 2 stroke engine raises a flag to me. JMO
They all look very oily.
are they oily because he run them for long time at idle?
Old 09-20-2020, 06:15 PM
  #188  
Senior Member
Thread Starter
 
Join Date: Sep 2019
Location: York, ME
Posts: 118
Received 13 Likes on 9 Posts
Default

Originally Posted by Siwy View Post
are they oily because he run them for long time at idle?
I don't really know the exact answer, however I ran the piss out of the motor before pulling out of the water. However, I then flush the motor for ~5-10mins on the muffs.

Also, I was looking back at video from when I first bought the boat last year and noticed that the motor did a lot of sneezing at low RPMs.
Old 10-12-2020, 09:04 AM
  #189  
Senior Member
Thread Starter
 
Join Date: Sep 2019
Location: York, ME
Posts: 118
Received 13 Likes on 9 Posts
Default

All -

Has been a couple of weeks since I was able to get out. This past Saturday, a beautiful day in the North East, I took the family out for one last time this season. Due to the swells, we stayed in the inner channel.

Not only did the motor start right up, but I was as able to troll without the motor stalling and was able to bump the throttle without issue. The wife even had commented that the motor has never run better as we did not have to constantly restart in no-wake zones.

Still would like to pull the plugs to see how each cylinder was firing.

Thanks to all who helped me learn/understand how to troubleshoot my outboard motor.
Old 10-12-2020, 10:07 AM
  #190  
Senior Member
 
Join Date: Oct 2004
Location: RI
Posts: 1,917
Received 411 Likes on 254 Posts
Default

That's great! So in the end, what do you think did the trick?
Old 10-12-2020, 10:43 AM
  #191  
Senior Member
Thread Starter
 
Join Date: Sep 2019
Location: York, ME
Posts: 118
Received 13 Likes on 9 Posts
Default

Originally Posted by SweetD View Post
That's great! So in the end, what do you think did the trick?
Definitely timing was off and I think once I pulled the carbs, I should have replaced the intake manifold gasket as I believe they were original and dried out.

I also replaced the rectifier as the encapsulation rubber was wearing away.

At least now I have a backup flywheel, stator, coils and all the tools to troubleshoot.
Old 10-12-2020, 02:11 PM
  #192  
Senior Member
Thread Starter
 
Join Date: Sep 2019
Location: York, ME
Posts: 118
Received 13 Likes on 9 Posts
Default

So I have about 10-18 hours on the new plugs; this is what they look like and a compression test (motor warmed up and all plugs pulled). Something that I wanted to note to anyone reading this thread, the HF compression test kit is way off vs the kit I used today.

I am no expert however, cylinder 1 looks perfect. Cylinders 2-4 might need the air/fuel mixture adjusted as the plug had excess fuel (no glazing).









Old 10-12-2020, 03:36 PM
  #193  
Admirals Club Admiral's Club Member
 
Dacman's Avatar
 
Join Date: Oct 2014
Location: Summerville SC
Posts: 9,302
Received 1,026 Likes on 776 Posts
Default Great news

Glad to hear you got some success
1 looks good to
me also ,the others maybe a tad rich.
Im no pro either
Old 10-13-2020, 05:26 AM
  #194  
Senior Member
 
Join Date: Jul 2016
Location: Perth WA
Posts: 2,972
Received 642 Likes on 404 Posts
Default

i would just leave it where it is providing its running fine .
compression is near enough to even , all good.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.