May 30, 2015: Keeping it Cool

A maintenance-only trip today and it couldn’t have been any more perfect a day to relax and enjoy a little man-boat time. We had a little issue coming into the marina on our last (Memorial Day weekend) return, where the Rose ran like a beast the entire trip back at 4300RPM without issue (the Captain had been faithfully monitoring the gauges, so it wasn’t a heat-building problem)…

Upon entering the marina’s no-wake zone, the starboard engine spiked temp at idle-speeds and the Captain immediately shut her down and proceeded in on one (port) engine. (Boring) quick video below captured the exact moment (at 1:48, or 90-seconds after going from 4300RPM to 800RPM):

So, today was all-about finding the cause and making sure everything was okay…

Turns out to be a really minor issue, as-expected after the quick inspection before we left last weekend. The radiator-cap on the starboard engine’s heat-exchanger let-loose last week, immediately spilling her coolant’s contents. Caps wear out, though this one popped a tab/ear. New caps were placed on-order last week, but they didn’t arrive in-time for today’s festivities, but that’s ok; verified everything is ready-to-roll when they arrive!

A quick look at the offending starboard engine's cap, supposed to be 16-pound spring-force...

A quick look at the offending starboard engine’s cap, supposed to be 16-pound spring-force…

...trouble is, this cap, even after repairing the tabs, would only hold 10-pounds, 30MAY15

…trouble is, this cap, even after repairing the tabs, would only hold 10-pounds, 30MAY15

Tested both the good (port) and popped (stbd) engine's coolant systems.  3-gallons of antifreeze later, the starboard-engine held the set-pressure for 5-minutes without a leak. Yea! 30MAY15

Tested both the good (port) and popped (stbd) engine’s coolant systems. 3-gallons of antifreeze later, the starboard-engine held the set-pressure for 5-minutes without a leak. Yea! 30MAY15

Ran both engines until fully warmed-up, those 165-degree thermostats are doing their job!! 30MAY15

Ran both engines until fully warmed-up, those 165-degree thermostats are doing their job!! 30MAY15

Measured temperatures all over the engines, this is the hottest spot I could find (starboard engine's port-side exhaust manifold).  Impressive cooling, considering the lower-manifold (where I'm hitting with the spot-laser) is cooled by engine-coolant (at 165-degrees) while the remaining exhaust system is raw-water cooled.  The hottest exhaust hoses were running at 105-degrees... impressive cooling!! 30MAY15

Measured temperatures all over the engines, this is the hottest spot I could find (starboard engine’s port-side exhaust manifold). Impressive cooling, considering the lower-manifold (where I’m hitting with the spot-laser) is cooled by engine-coolant (at 165-degrees) while the remaining exhaust system is raw-water cooled. The hottest exhaust hoses were running at 105-degrees… impressive cooling!! 30MAY15

Another maintenance issue to take care of, the cockpit's fire extinguisher was dead this season... 30MAY15

Another maintenance issue to take care of, the cockpit’s fire extinguisher was dead this season… 30MAY15

Yea! New extinguisher installed at the helm, that makes a total of 4 extinguishers within arm's reach! 30MAY15

Yea! New extinguisher installed at the helm, that makes a total of 4 extinguishers within arm’s reach! 30MAY15

Vacuumed and cleaned everything before leaving the Rose, today turned out to be another really nice day at the marina. Happy Wakes! Feel free to drop me a note anytime, ChristinaRose@edickent.com

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