Thread subject: Whaler Central - Boston Whaler Boat Information and Photos :: 1985 YAMAHA 40ELK

Posted by John Houlihan on 08/04/10 - 12:04 PM
#1

Now that I have a few hours on this motor (on my 13' Whaler Sport) I have a few more question:

1. It seems to use 1.5 gallons per hour (give or take depending on sea conditions, load, speed) Is this a lot, a little or about right?

2. I have checked the oil injection tank from time to time and it appears to use very little oil. I've put at least 4 tanks (approx 5 gallons/tank). I cannot even see the oil level since I filled the tank. Before that I could clearly see the level. Do these motors use very little oil?

3. Max top speed (on flat water) seems to be 36mph according to the GPS. Is this typical, high or low for this boat/motor combination?

JTH

Posted by John Fyke on 08/04/10 - 1:01 PM
#2

The motor will use at least 50 gallons of gas to one gallon of oil. 36 mpg is not bad for the size motor. Contact some other members and see what they get for gas useage on that motor.

Posted by John Houlihan on 08/04/10 - 1:10 PM
#3

OK, I need to put a lot more gas through the motor before I notice the oil level going down. Thanks for the reply.

JTH

Posted by CES on 08/04/10 - 3:04 PM
#4

To answer your questions, yes your motor will burn a lot of gas. Though it is a 40hp, it's from the mid 80's and it will eat gas.

To make sure your oil pump is working, run your motor on the muffs. If blue smoke is coming out of the exhaust then you know you're burning oil.

Also, I'm running about 32mph too.

I think your motor is fine.

Edited by CES on 08/04/10 - 3:08 PM