calculating HP and speed

[mojoe]

Some people like to add a second outboared engine for emergency.If you were wondering what outboared HP would work for your boat, as a second emergency engine.this formula might help http://www.go-fast.com/boat_speed_predictions.htm. And i was reading that a 10% of your boats original HP can be sufficient for a second emergency motor.Example,a 220 HP boat will need about 20 to 25 HP engine for emergency to get them home while offshore boating.And in a lake will need one HP per one meter .SO if your boat is 8 meter long,you will need 8 HP for emergency motor.

[shrew]

A SeaTow or Boat US membership is significantly cheaper. Look at the effective range of any gas powered express cruiser. Then look at the tow range of a tow service. It is doubtful you will ever run out of tow range. Any kicker on a express is going to ugly and in the way. If you're truly determined to have redundancy, then look into a model with twins. Short of a fuel problem, it is highly unlikely both engines will die at once.

[mojoe]

I agree with you 100%.,But for people who live a broad,and tow service is not available,and for boaters who made up there mind to add a second outboared,the information stated above, might be a good start to figure out the hp needed for your addition.

[Phillbo]

Originally Posted by mojoe

I agree with you 100%.,But for people who live a broad,and tow service is not available,and for boaters who made up there mind to add a second outboared,the information stated above, might be a good start to figure out the hp needed for your addition.

Good info... Thanks for sharing for those that need it.

[mojoe]

Originally Posted by Phillbo

Good info... Thanks for sharing for those that need it.

You are very welcome,and good to be part of this forum.