Mercury owners

[Robs88]

Is my cavitational plate too far under water? can i go up two holes without causing an overheating issue? here's a pic.

 

[Chris1956]

Re: Mercury owners

It looks to be just under. I would go up 1 hole and retest. What motor and what boat and what speed are we discussing here.

On my speed boat, I have the motor set so the zinc anode is clear of the water, however, I plugged the top water intake hole and elongated the lowest water intake hole.

 

[Robs88]

Re: Mercury owners

It looks to be just under. I would go up 1 hole and retest. What motor and what boat and what speed are we discussing here.

On my speed boat, I have the motor set so the zinc anode is clear of the water, however, I plugged the top water intake hole and elongated the lowest water intake hole.

This is a 1997 Mercury 115hp and speed is around 34mph motor trim down with a 17p prop.

 

[Robs88]

Re: Mercury owners

Bump .....

 

[Fuzzytbay]

Re: Mercury owners

I've always set the cavitiation plate to be within 1" of the bottom of the hull, without being lower than the hull.
I'm not sure what boat you have it on, but 34 mph on a 115 seems slow to me, unless its a bigger heaver boat.

 

[Robs88]

Re: Mercury owners

Motor is on a angler 170CC factory weight is rated at 1170lbs

 

[Faztbullet]

Re: Mercury owners

That motor has the water intakes high up on the front of gearcase, 1 hole is about max I would go as it may loose water flow in a hard turn.

 

[Jeep Man]

Re: Mercury owners

Cav plate should be slightly below the low center of the transom

 

[Fuzzytbay]

Re: Mercury owners

This is a 1997 Mercury 115hp and speed is around 34mph motor trim down with a 17p prop.

What rpm is it running at?

 

[Robs88]

Re: Mercury owners

What rpm is it running at?

Rpm gauge shows around 5200-5250