"Tijereta"/w Volvo TAMD40B outdrive overheats high speed

[GuatemalaDave]

Last March my partner, Dennis Wheeler and I sent a 25' Carver outdrive with a 165 hp Volvo TAND40B diesel down to Guatemala. Right now we have finished the outfitting and everything is ready to go fishing , with one exception...

At displacement speed everything appears to run perfect. When the speed is advanced to cruise and the boat planes off it overheats rapidly. I had never run the boat personally in New Jersey, but I know the old owner had no problem to plane off and get some speed out of it.

Right now we have a great 10 knot boat but that just won't cut it to get out to the main sailfish grounds of 20 to 30 miles. I know some of boatingand fishings greatest minds are reading this post so I am looking for some ideas as to what can be done to allieviate this problem.

Right now I am up in Absecon trying to find 18" fluke so it is Dennis that is down in Guatemala actually doing the hands on work on the boat. I'm sure he has done all the regular checks, new impeller, thermostat and the like. His next move is to scoop more water into the intake, believing that on plane the boat is getting air into the intake.

The water temperature in Guatemala is always over 80 degrees and usually 90+ so I am sure that may have some influence.

Dennis and I would appreciate any information and ideas as how how to fix this problem

 

[Don S]

Re: "Tijereta"/w Volvo TAMD40B outdrive overheats high speed

Normally, a TAMD engine is an inboard not an outdrive engine. So, does your boat actually have an outdrive or not?
Have you checked the impeller in the raw water pump?
If you actually do have an outdrive, check the water hose connection where the hose from the transom shield hooks up to the outdiver. That hose connection has a bad habit of corroding inside the hose and will suck air when on plane. May look fine on the outside, but take the hose off, if it doesn't fall off when you grab ahold of it.

 

[GuatemalaDave]

Re: "Tijereta"/w Volvo TAMD40B outdrive overheats high speed

Actually in the outdrive model this motor is labled AQAD40B and on this boat the raw water intake is thru the hull. Our next step is to try a scoop intake, but I am just crusing for ideas and I know thie ie the place to find them.

 

[GuatemalaDave]

Re: "Tijereta"/w Volvo TAMD40B outdrive overheats high speed

There are a lot of eyes on this page ther must be some other ideas. Thanks in advance

 

[rodbolt]

Re: "Tijereta"/w Volvo TAMD40B outdrive overheats high speed

always remember, all the water it takes in MUST go out or it overheats.
if the seawater pump and intakes are clean and leak free then look at the heat exchanger,manifolds and risers.

 

[GuatemalaDave]

Re: "Tijereta"/w Volvo TAMD40B outdrive overheats high speed

We have the mechanic picking up gaskets to clean and check the heat exchanger and other choke points so hopefully we will be on the water chasing sailfish shortly.