Water Pump Failure 35 Miles Offshore – Yanmar 4JH4E Breakdown & Discovery

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While crossing the Mona Passage, 35 nautical miles offshore, we ran into trouble with our Yanmar 4JH4E. We were motoring in light winds when we noticed a change in the exhaust pitch — turns out, seawater wasn’t flowing properly. We checked the impeller and, strangely, it looked intact… but it could spin freely by hand — not a good sign. After getting towed back to our anchorage at midnight (huge thanks to Michael, who came out and saved us!), we dug deeper and discovered that the gear inside the old water pump had worn down badly. It turns out the pump wasn’t making full contact with the internal gear, likely due to an aftermarket impeller and shallow gear engagement. We ordered a new OEM water pump from R&B Power in San Juan, and they were awesome — super responsive and got us the part

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This Rogue was built by a luthier as the "just-right" size amongst John Welsford's many capable camp cruising sailboat designs. Here it sails in Puget Sound with other participants in the 2019 Salish 100 Small Boat Cruise. Off Center Harbor is an online destination for great boats, stories, and boating skills: www.offcenterharbor.com/yt-1910/ The Rogue is 14'7" long with a 4'5" beam, rigged here as a yawl with a leeboard but capable of diverse rigging configurations. John Welsford Small Craft Design: http://www.jwboatdesigns.co.nz/ Welsford Rogue: http://www.jwboatdesigns.co.nz/plans/rogue/index.htm The first-ever SALISH 100 was a small-boat cruise in June 2019, running the length of Puget Sound--100 nautical miles from Olympia to Port Townsend, Washington, including more than 100 watercraft ranging from SUPs to kayaks, rowing boats to pocket-cruising sailboats, and about 15 larger support boats, otherwise known as Motherships. Planned overnight stops along the route included Hope Island Marine State Park, Penrose Point Marine State Park, Gig Harbor, Blake Island Marine State Park, the Port of Kingston, and Mats Mats Bay before reaching our final destination in Port Townsend. Salish 100: https://www.facebook.com/groups/285180382147515/ Port Townsend Pocket Yachters: https://www.pocketyachters.com/