OMC coil on Villiers core

[Keith.P]

But that's the point, if you have bad water flow with the prop on, then its likely that you have partly blocked water ways.
Run it with no prop, its more likely to pump better until its on the transom of a boat.

[cajuncook1]

I'm going to check out the impeller and water pathways before I remove the cylinder head.

Anyone have a torque value for tightening the cylinder head nuts?

Thanks for all the help and suggestions!

David

[cajuncook1]

Great to see it running well! Surprised you have the part already!

The head has no water passages, but if there is a build up of stuff in the water jacket area, heat conduction away from the head might not be as fast. Some folks like to clean the water jacket when they get the motor, can't remember if you said it was a salt water motor or not. Even so a fresh water motor can have lime and mud as well as rust partially clogging the water jacket passages. The water flow looked a little low, but I think the prop was on, and long shaft motors tend to not pump as well as short shaft motors.

The exit water should show about a 20-30 F temperature rise from what you have in the bucket when it is producing a good flow, the water will be quite hot at first when rev'd up if it has idled with no water flow for quite a while. Like 2-3 minutes.

Was it a long shaft? To assess the water flow when run in a bucket, they usually recommend taking the prop off which gives similar results to what you might see on a boat.


I found a new coil and measured the dia and it was smaller than the ones I tried, looks to be about 43.8 mm with a cheapo plastic caliper. Will measure with a proper caliper and get back with that measurement.

Phil, let me know how the smaller coil works. I agree that I should pull the cylinder head and visually inspect the water jackets.

Do you know the torque value the cylinder head nuts?

Thanks,

David

[Horsley-Anarak]

18 foot pounds for 5/16th head bolts.

I just do them FT.

H-A

[cajuncook1]

Thanks HA!

David