95 150 Ocean Pro timing

[ermess]

I have performed sync and link on 95 Ocean Pro 150 twice in the past 3 months. Runs great for 3 or 4 fishing trips than loses timing and timing knock returns at 3000+ rpms ?
Any Ideas?
Thanks
Ed

 

[VI-Doug]

Re: 95 150 Ocean Pro timing

I have the same motor, only 175 HP. I haven't had to mess with the timing yet. What is moving to change the timing? The flywheel key may be sheared and the flywheel is moving on the shaft? Mine has that little black piece on top of the timing arm that says + and -. I don't know what that does yet.

 

[jonesg]

Re: 95 150 Ocean Pro timing

timing arm that says + and -. I don't know what that does yet.

Thats advance ..retard,

uh thats the timing ...not you

You're right, if its set right it shouldn't move, sheered woodruff key or...check the throttle pickup roller gap.
See this , for 60deg 6 cyls.
http://www.bbcboards.net/zerothread?id=357667

Mine was way off.

 

[ermess]

Re: 95 150 Ocean Pro timing

roller was within a 1/4"-1/8" of arm, loosened screw and tried to reposition, but that is as close as I can get to arm

 

[ermess]

Re: 95 150 Ocean Pro timing

Went back and adjusted spark/throttle to spec. Roller now comes in contact with arm. Will water test tomorrow. Do you think this could have been problem?

Ed

 

[jonesg]

Re: 95 150 Ocean Pro timing

They thought it important enough to make a sticky for it.
It might be something else but troubleshootin is a matter of elimination.

 

[ermess]

Re: 95 150 Ocean Pro timing

Finally got boat in water this afternoon, changed plugs. Boat still has timing knock between 3500 rpm and 5000. Anything before 3500 - no knock, Anything after 5000 no knock. Any other ideas?
Thanks
ED

 

[jonesg]

Re: 95 150 Ocean Pro timing

Check this,
http://www.maxrules.com/fixomcoisignition.html

Then consider it might not be timing, do a compression test and try a timing light when it starts knocking on eaqch plug wire, it might be dropping spark.

 

[ermess]

Re: 95 150 Ocean Pro timing

This only occurs under a load, could this be Stator, ignition coil, powerpack, optic eye?
I am a small mobile mechanic, and have a good relationship with local Johnson/Evinrude marina and we are stumped.

Thanks
Ed

 

[ermess]

Re: 95 150 Ocean Pro timing

Checked compression,110 on all 6, Any ideas?
tired of throwing money at this engine. Every time I time it, she runs great for a while, then starts knocking.

Thanks

Ed

 

[jonesg]

Re: 95 150 Ocean Pro timing

Consider a dynamic imbalance, prop out of balance maybe.