The importance of your transmission oil cooler


seafeverofcuan <seafeverofcuan@...>
 

To all members
Recently while crossing the Tehuantepec Bay a distance of 230 miles we had as anticipated light winds and lots of motoring. All fluids and filters were checked and topped off.
20 miles South of Acapulco motoring at 2300RPM at 0200hrs the engine surged a couple of times and stopped.
During long runs like that we regularly check the engine room temperatures with a laser thermometer and nothing had previously seemed amiss. The transmission unit now was 84C it is normally around 50 to 55C and the ATF fluid was gone and replaced with emulsified sea water, a grey colour from what little oil or grease there was left in the bearings etc.
The transmission had seized and after sailing for four hours to allow everything to cool down, to it's credit the transmission engaged enough ahead to allow us to motor into Acapulco gently at 1500RPM against the headwinds. It would not engage astern as the clutch was seized.
The transmission is destroyed due to a pin hole leak in the oil cooler, we had the cooler professionally cleaned in August last year and I checked it myself when I returned to the boat in October to ensure the Bowman rubber end caps and clips were in good condition.
It is a painful lesson, the engine has 3000 hours and runs like a dream, clearly that cooler now has to regularly inspected and or changed as part of my maintenance program.
I hope this email will save someone else the costs and hassle we are now incurring.
Fair winds,
Trevor Lusty

Seafever of Cuan
Super Maramu no 425
Acapulco
Mexico


Dave_Benjamin
 

Trevor,

Sorry to hear about this turn of events. Let me know if you need any assistance importing parts. We do a lot of business in Mexico so we've got the resources to help. Good luck getting things sorted. I wish I had a mechanic to recommend in Acapulco but they are all further north.

--- In amelyachtowners@..., "seafeverofcuan" <seafeverofcuan@...> wrote:

To all members
Recently while crossing the Tehuantepec Bay a distance of 230 miles we had as anticipated light winds and lots of motoring. All fluids and filters were checked and topped off.
<snip>
Fair winds,
Trevor Lusty

Seafever of Cuan
Super Maramu no 425
Acapulco
Mexico


rossirossix4
 

It has been a while since the post but I thought I would add this comment for anyone looking at transmission oil cooler issues.  About a year ago we picked up a spare transmission cooler from a dealer in Malta. We met up with Bebe in Siracusa, Sicily and Bill gave us a source for a good deal in Malta, our next stop.  When I received the spare (he delivered it to the boat and we talked a bit), the specialist told me that the part virtually never fails but when it does it is almost always due to over-tightening the hose clamp when reinstalling.  This cracks the soldered joint internally and allows seawater to mix with the ATF.  In examining the new spare it was easy to see how this could happen.  So if you clean or inspect it or even replace it, you or your service tech may want to be careful during the re-installation process to use only a moderate amount of clamping pressure.
Bob, KAIMI SM 429