2001 johnson ocean pro losing 2 of 4 cylinders on plane,,HELP?

[jacksmith2009]

all in the title.....idles fine, when full throttle and on plane, 2 of 4 cylinders are lost. Any info? EASY troubleshooting techniques...anything helpful would be great.

THANK YOU FOR YOUR TIME AND INPUT/S.....

JACK

 

[tashasdaddy]

Re: 2001 johnson ocean pro losing 2 of 4 cylinders on plane,,HELP?

could be coil, as 2 cylinders run off one coil.

 

[kenmyfam]

Re: 2001 johnson ocean pro losing 2 of 4 cylinders on plane,,HELP?

I'm on board with the coil as well.
Welcome to iboats.

 

[Faztbullet]

Re: 2001 johnson ocean pro losing 2 of 4 cylinders on plane,,HELP?

If you are losing 2 cylinders opposite each other (say 1 & 2) it could be a coil as this is 2 seperate coils molded together but if its a bank (say 1 & 3)are dropping its possible stator or pack problem.

 

[jonesg]

Re: 2001 johnson ocean pro losing 2 of 4 cylinders on plane,,HELP?

Does it have a shift interrupt switch, if yes , disconnect it and test run it.

If no... try swapping coils and see if the problem follows the coil.

If the problem stays put then I'd look at the power pack and stator.
If the insulation is melting and dripping down from the stator, thats a good sign its gone south.

Otherwise you need a peak reading meter and the shop manual to do the tests that will pinpoint the trouble .

www.outboardbooks.com

Get the meter off ebay $75.
Scroll down,
http://cgi.ebay.com/ebaymotors/Mari...tZMotors_Automotive_Tools?hash=item35a473afc8

 

[tashasdaddy]

Re: 2001 johnson ocean pro losing 2 of 4 cylinders on plane,,HELP?

what HP?

 

[ezeke]

Re: 2001 johnson ocean pro losing 2 of 4 cylinders on plane,,HELP?

Sounds like S.L.O.W. is activating; check your cooling system.

 

[jacksmith2009]

Re: 2001 johnson ocean pro losing 2 of 4 cylinders on plane,,HELP?

It is a 90 horse

 

[ezeke]

Re: 2001 johnson ocean pro losing 2 of 4 cylinders on plane,,HELP?

If it turns out not to be S.L.O.W., you might want to print out the CDI troubleshooting guide for your engine: http://cdielectronics.com/downloads...oting Guide 2009 - OMC 4 Cylinder Optical.pdf

 

[tashasdaddy]

Re: 2001 johnson ocean pro losing 2 of 4 cylinders on plane,,HELP?

good call ezeke. could be, but i thought that just limits rpms, not kill cylinders.

 

[Chris1956]

Re: 2001 johnson ocean pro losing 2 of 4 cylinders on plane,,HELP?

The S.L.O.W. systems limits RPM by killing the spark to one bank of cylinders. it is controlled by the temp sensor on one of the heads.

 

[reeldutch]

Re: 2001 johnson ocean pro losing 2 of 4 cylinders on plane,,HELP?

i could be wrong but i tought that slow retarded the timing on all cylinders.