1989 johnson 40 hp Please help.

[Ga2012]

Hello everyone.
I bouth the boat it come with 1989 johnson 40 hp and when I do the running test the motor run hot so fast and jerking
so much and here what I have done I have water pump, lowere gear oil, clean carburator and when I check compression,
I only have 90 on both cylinders. Also I saw this wire was not connect and I have no clue what it for. do I have to connect them back? And for this motor what is the right compression. If any one can tell what I have to do to get it run right or is the time to rebuild the whole motor?
Thanks,
GA2012

 

[Joe Reeves]

Re: 1989 johnson 40 hp Please help.

You must mix oil with your fuel on this engine... mixture is 50/1.

1st picture shows the oil line is plugged.... VRO is used as a straight fuel pump.

2nd picture shows that the electrical portion of the VRO is disconnected which is proper when plugging the oil line, otherwise you would be receiving a false VRO warning via your warning horn.

 

[Ga2012]

Re: 1989 johnson 40 hp Please help.

You must mix oil with your fuel on this engine... mixture is 50/1.

1st picture shows the oil line is plugged.... VRO is used as a straight fuel pump.

2nd picture shows that the electrical portion of the VRO is disconnected which is proper when plugging the oil line, othewsie you would be receiving a false VRO warning via your warning horn.

Joe, thank you for the help.
Yes I have mix oil and fuel 50/1 and on 1st piture the oil line is not connect they closed it with electrical tap. Do I have
to connect that two plugg back or leave it along.
Thanks,
GA2012

 

[Joe Reeves]

Re: 1989 johnson 40 hp Please help.

Leave that electrical plug disconnected..... leave it alone.

The electrical tape is not a good seal. Plug that oil fitting with a short piece of hose that has a bolt in it to seal it properly... and clamp the bolt tight and also clamp the hose tight to the oil pipe.

 

[Ga2012]

Re: 1989 johnson 40 hp Please help.

Leave that electrical plug disconnected..... leave it alone.

The electrical tape is not a good seal. Plug that oil fitting with a short piece of hose that has a bolt in it to seal it properly... and clamp the bolt tight and also clamp the hose tight to the oil pipe.

Joe, thank you so much for all your help.
GA2012