Timing Issue On A 1988 OMC 140 HP Looper Sea Drive

[jesmitter]

I have two OMC 140 HP Looper Sea Drives on my 24' SeaRay. The fuel economy isn't good but, the timing is off a bit. I'm hopeful that it will improve by correctly adjusting the timing to factory spec.

The manual states an 18 degree BTDC timing spec. the best I can get it to is 12 Degrees BTDC. I have tested and checked the Power Pack, Voltage Regulator, Stator, Timing Ring, and the timing magnet installed on the Flywheel inner hub. All looks good. The engines run great. At 5,000 RPM, I cruise at 37 mph. However, as I mentioned, my fuel economy is terribly lacking.

As far as I can tell, there are only two adjustments. One to set idle timing/speed on the throttle linkage and the other located under the flywheel which sets timing ring movement range. I just need 6 more degrees!

What am i missing???

 

[southkogs]

Sea Drives are outboards, correct? I've moved you into the outboard section to see if you can get some better answers.

Welcome aboard.

 

[boobie]

Check your throttle linkage over and make sure your timing light is correct.

 

[jesmitter]

Check your throttle linkage over and make sure your timing light is correct.

All that's good.

 

[boobie]

Did the timing magnet on the inner flywheel slip ??

 

[jesmitter]

No, that was the first thing I checked.

 

[jesmitter]

As a note, I'm getting 1.35 mpg from both engines running together with the timing on both engines off by 6 degrees. The engines tune and run identically. I need that 6 degrees!

 

[Faztbullet]

6 degrees will not improve economy and from other forum the way you are checking maybe incorrect.