Electronics
Replaced Sitex MDA5 with Garmin AIS800 [serial number removed]
A history of care / 2018 — 2026
The work, in the log.
The service calls, the winter projects, the repairs underway. An eight-year record of maintaining and improving Mavis, drawn from the captain’s maintenance spreadsheet.
167 recorded entries. January 2018 through July 2026. Dates, engine hours and notes describe the work at that time; they do not certify equipment’s current operating condition.
Download the historyBuyer copy: serial numbers and individual service-provider names removed. Engine hours before the November 2018 repower belong to the previous engine. Source entries are reproduced with their original wording except for these privacy edits.
167 entries · newest first
Propulsion
Changed oil with Shell Rotella T4 15w40.
Propulsion
Changed oil with Shell Rotella T4 15w40 and CarQuest 85334 Filter. Refilled ~50% with Shell Rotella T4 15W-40, then extracted again to remove residual oil
Electrical
Replaced bow navigation light assembly with Hella Marine 2nm LED navigation light.
Propulsion
Replaced engine oil with Shell Rotella 15w40.
Rigging & Winches
Replaced backstay tension line with 27' 1/4" Stay-Set
Hull / Deck
Diver cleaned hulls.
Electrical
Upgraded solar panel. Replaced existing Grape Solar 256w panel with QCell Q.Peak Duo BLK ML-G10+ 410w Solar Panel
Propulsion
Changed oil with Shell Rotella T4 15w40 and CarQuest 85334 Filter
Propulsion
Changed oil with Shell Rotella T4 15w40
Other / Miscellaneous
Replaced ship's compass with Ritchie SR-2
Other / Miscellaneous
Replaced port and starboard bow seat clamp on rail mounts (4) with West Marine model 5142070
Propulsion
Changed engine oil and filter w/ Shell Rotella 15w40 and STP S2808
Other / Miscellaneous
Boat Launched!
Plumbing
Commissioned fresh water system after layup. Serviced pump filters.
Propulsion
Purged cooling system and added 1.25 gallons Prestone Max predilluted coolant.
Propulsion
Replaced heat exchanger zinc anode.
Propulsion
Replaced raw water pump impeller w/ Johnson Pump Part # 09-810B-1
Propulsion
Greased prop shaft, reinstalled propeller and spinner.
Hull / Deck
Compunded hulls w/ 3m Super Duty. Waxed with Collinite Fleetwax.
Propulsion
Reinstalled Sillette Sonic Drive. Replaced bellows. Filled leg with 6.5 quarts West Marine 90 hypoid gear oil.
Electronics
Upgraded autopilot system. Removed old systems. Installed p70s control head [serial number removed] at helm. Installed ACU 100 [serial number removed] under starboard berth. Installed Evolution EV1 Sensor Core [serial number removed] under starboard berth.
Hull / Deck
Hulls sanded and painted with 2 Coats of Sea Hawk BioCop TF ablative antifouling. (2 Gallons)
Other / Miscellaneous
Replaced headliner in main cabin closet. HullBlanket Carpet-Type Headliner. Color: Sand.
Hull / Deck
Sanded and painted anchor locker with Petit EZPoxy topside polyurethane paint.
Hull / Deck
Sanded hull and centerboards in preparation for bottom paint.
Propulsion
Removed Sillette drive leg for lubrication, painting and service.
Hull / Deck
Boat Hauled & Blocked. Bottom pressure washed.
Plumbing
Winterized fresh water system and toilet.
Propulsion
Winterized Engine
Rigging & Winches
Replaced lazy jack lines with 55' of 1/4" StaySet white w/ blue fleck
Rigging & Winches
Replaced main halyard with 91' of 3/8" Stayset White w/ Blue Fleck
Electrical
Replaced shore power inlet with Marinco Stainless Steel 30 Amp 125 inlet.
Propulsion
Changed Engine Air Filter w/ 211-08132
Propulsion
Changed Engine Oil with Shell Rotella T4 15w40. Replaced oil filter with STP S2808.
Propulsion
Changed Engine Oil with Shell Rotella T4 15w40.
Propulsion
Changed Engine Oil with Shell Rotella T4 15w40. Replaced oil filter with STP S2808.
Electrical
Replaced 1200w Inverter with new Redodo 2000w pure sine wave inverter. Eliminated dedicated starter battery and added it to house battery bank which is now 3 2023 79ah AGM batteries (237ah). Updated Victron battery monitor with new total capacity.
Electrical
Installed Victron Energy Blue Solar MPPT 100/30 charge controller.
Propulsion
Changed Engine Oil with Shell Rotella T4 15w40
Hull / Deck
Serviced cockpit enclosure. Replaced 15 zippers with YKK #10 Vislon zippers.
Hull / Deck
Replaced side windows with .177 Lexan MR10 Margard. Material installed with Dow 795 Adhesive and screws. Plastic sheet furnished, cut and painted by Islandwide Plastic.
Hull / Deck
Replaced both windshields with .177 Lexan MR10 Margard. Plastic supplied by Islandwide Plastics in 2021 was incorrect. It was General Purpose Lexan not suitable for marine use. Islandwide Plastics cut and painted the replacements.
Electronics
Installed new Fusion RA-70 Stereo system to replace Kenwood KMR-D768BT which was damaged by lightning.
Electronics
Installed 5" cockpit speakers.
Electronics
Replaced Raymarine wind indicator masthead unit and instrument which were damaged by lightning.
Electronics
Replaced Garmin 942 chartplotter with factory recertified unit due to lightning damage.
Electrical
Installed Victron BMV-712 Smart Battery Monitor on AC / DC power panel.
Electrical
Replaced house battery bank with 2 79Ah group 24 AGM batteries. Cleaned all battery connections.
Propulsion
Oil and filter changed with Shell Rotella T4 15w40 and STP S2808 filter.
Electrical
Installed new 79ah AGM Battery replacing last remaining lead acid battery.
Safety
Replaced Lifesling II Storage Bag
Propulsion
Replaced raw water pump impeller w/ Johnson Pump Part # 09-810B-1
Hull / Deck
Boat launched and sailed to her slip in West Sayville. Engine started immediately and ran perfecftly after layup.
Rigging & Winches
Replaced starboard centerboard line.
Hull / Deck
Bottom sanded and painted w/ 2 Coats of Micron CSC black
Hull / Deck
Compounded hulls w/ 3M Super Duty compound. Waxed hulls w/ Collinite.
Hull / Deck
Add vinyl graphics "Mavis" to both bows.
Sails
All sails cleaned and serviced. Tell tales added. Restitched top batten pocket on mainsail. Restitched UV covers on genoa and screecher.
Propulsion
Reinstalled drive leg. Replaced bellows #62. Filled w/ West Marine 90 weight hypoid gear oil.
Propulsion
Serviced and painted drive leg. Replaced propeller with Volvo 813296. 15" Diameter. 11" Pitch 4 bladed. 17 spline "short hub" Left Hand prop.
Plumbing
Winterized fresh water system, head and holding tank.
Propulsion
Winterized engine with propylene glycol -50 antifreeze
Propulsion
Removed Sillette drive leg for lubrication, painting and service.
Dinghy
Removed Dinghy from davits for winter storage and service.
Hull / Deck
Hauled out and blocked for winter storage at Sunset Harbour Marina.
Sails
Removed screecher, jib and mailsail for cleaning and service. Removed Stack Pack.
Propulsion
Replaced engine oil w/ Shell Rotella T-4 15w40. Replaced engine oil filter w/ Napa Gold 1344
Plumbing
Replaced broken fuel selector handle.
Plumbing
Replaced section of leaking raw water hose.
Propulsion
Removed engine. Replaced oil pan and drain hose assembly. Reinstalled engine. Replaced primary fuel filter, oil filter and heat exchanger zinc. Filled with oil.
Hull / Deck
Replaced sail locker hatch gasket.
Steering
Replaced starboard steering cable (M66x14) and helm assy. Lubricated and adjusted steering system.
Hull / Deck
Diver cleaned hulls.
Propulsion
Changed Engine Oil. Replaced Filter w/ Napa Gold 1344
Propulsion
Changed Engine Oil
Electrical
Replaced master cabin and starboard aft cabin bulbs with LED. Installed LED strip lighting in master cabin.
Electrical
Replaced Aqua-Signal series 25 bow light fixture.
Plumbing
Replaced hot and cold galley faucet valve cartridges.
Electronics
Replaced failed Power/Audio module for GXM-54 Satellite receiver with unit provided at no cost by Garmin.
Electronics
Removed 2 GFL-10 fuel sensor modules. Units were not being used but drawing power.
Electrical
Replaced Aqua-Signal series 25 Stern light fixture.
Electronics
Installed SI-TEX MDA-5 Class B/SO AIS Transciever [serial number removed]
Other / Miscellaneous
Removed masthead wind vane for inspection. Lubricated and replaced.
Steering
Replaced Port Side M66-19' Steering Cable. Replaced helm unit.
Other / Miscellaneous
Replaced windshields in main saloon and forward cabin/head with .177 Lexan and Dow 795 adhesive.
Plumbing
Replaced Bosworth Sea-Lect plastic diverter valves for Whale Gulper pump w/ brass ball valves.
Plumbing
Replaced failing Atwood water heater w/ new Kuumo 6 gallon electric / calorifier heat unit. Flushed cooling system.
Propulsion
Changed engine oil w/ Shell Rotella 15w40 T4. Replaced engine oil filter w/ Napa Gold #1344. Replaced heat exhanger anode. Replaced Racor filter w/ 20 micron.
Hull / Deck
BOAT LAUNCHED!
Propulsion
Replaced raw water pump impeller.
Hull / Deck
Bottom sanded and painted w/ Micron CSC black
Hull / Deck
Hulls compounded and waxed.
Rigging & Winches
Replaced worn steering lines between rudders and Sillette drive w/ 3/8 Nylon double braided line.
Propulsion
Reinstalled drive leg. Replaced bellows #62, yoke #35, swivel pin #13, lift pins #14 and latch pin #20.
Propulsion
Sanded and painted drive leg w/ 2 coats of Zinc Oxide etching primer and 3 coats of Mercruiser Phantom Black. Top coated w/ 1 coat of Mercruiser clear coat.
Propulsion
Removed Sillette drive leg for lubrication, painting and service.
Electronics
Removed Raymarine ST60 Tridata display and replaced w/ Garmin GMI-20/. Installed Airmar DST-800 transducer and connected to NMEA 2000 network.
Plumbing
Winterized fresh water system, head and holding tank.
Sails
Headsails serviced. "Wash, Check and repair sail. Check over stitching on UV Cover/Lufftape/spreader area, leechline cleat at head/tack webbings Add telltales. Restitched UV Cover and open seams. Resew UV Cover. Restitched open seams. Added chafe/spreader patches where leech ripped up Wash, Check and repair sail Wash Screacher Wash, Check and Repair Screacher. Notes: Heavy green mold. Added minor chafe patches where worn. Green slime/mildew cleaned up well.
Hull / Deck
Boat Hauled & Blocked. Hulls acid washed.
Hull / Deck
Replaced cockpit skylights w/ .220 Optix Acrylic sheet.
Electronics
Replaced ST60 wind instrument w/ Raymarine i60 [serial number removed]
Propulsion
Changed engine oil w/ Shell Rotella 15w40.
Propulsion
PRM30 Transmission replaced under warranty due to failure of the input bearing.
Propulsion
Changed engine oil w/ Shell Rotella 15w40. Changed oil filter using Beta Marine 211-60390
Propulsion
Changed engine oil w/ Shell Rotella 15w40.
Propulsion
Replaced heat exhanger zinc anode.
Electronics
Installed Garmin GXM-54 satellite weather receiver.
Rigging & Winches
Serviced all winches on board. Removed, cleaned and lubricated.
Propulsion
Replaced raw water pump impeller.
Propulsion
Replaced engine air filter 211-08132.
Plumbing
Removed holding tank. Identified leak in elbow. Replaced old sanitation hoses with Sheilds XHD 148. Tested system. No longer leaking. Smells fresh as a daisy.
Electronics
Installed Garmin NMEA 2000 network bus behind instrument panel. Installed 2 Garmin GFL-10 fluid level adapters and connected to Port and Starboard fuel tanks. Performed initial tank calibration.
Other / Miscellaneous
Replaced cracked tachometer bezel w/ replacement provided by Beta Marine under warranty.
Steering
Replaced complete steering system including helm, port & starboard steering cables. Unfroze and adjusted steering linkages. Lubricated system.
Propulsion
Engine oil and filter change using Shell Rotella 15w40 and Napa Gold filter 1344.
Propulsion
Replaced fuel filter w/ Racor 10 micron.
Propulsion
Replaced port side diesel keyless filler cap.
Propulsion
Changed engine oil w/ Shell Rotella 15w40.
Propulsion
Changed engine oil and filter w/ Shell Rotella 15w40 and Beta Marine filter 21-60390.
Propulsion
Initial engine oil and filter change w/ Shell Rotella 15w40 T4
Propulsion
Initial transmission fluid change.
Propulsion
New Engine Installed. Beta Marine 30 [serial number removed] w/ PRM 90 Transmission and "C" Panel
Propulsion
Changed engine oil and filter
Safety
Replaced carbon monoxide detector w/ Kidde model KN-COB-LPZ
Rigging & Winches
Tuned standing rigging. Set tensions per Gemini owner's manual.
Propulsion
Removed starboard fuel tank for cleaning and inspection. Reinstalled.
Propulsion
Replaced lift pump P/N 39275 w/ Facet MMDW-40386
Propulsion
Replaced Racor 12T fuel filter. Replaced accuvue bowl. Replaced primary engine fuel filter element.
Propulsion
Replaced engine oil w/ Shell Rotella T-4 15w40. Replaced engine oil filter w/ Fram PH3593A
Rigging & Winches
Replaced genoa sheets w/ single 100' line blue Stayset 1/2"
Electrical
Replaced main saloon fans with 2 Canframo Bora 12v fans model 748.
Rigging & Winches
Replaced worn screecher furling line w/ 75' Green 3/8 line.
Electrical
Replaced failing house battery bank with 2 West Marine 79AH AGM Batteries - Group 24.
Electrical
Installed 1200 w inverter in cabinet above batteries.
Propulsion
Replaced heat exhanger zinc anode.
Electrical
Installed Grape Solar 265w Solar Panel and MPPT charge controler.
Propulsion
Replaced Sillette Sonic drive Yoke part #35. Greased all fittings and adjusted locking cable.
Hull / Deck
Installed 2 Johnson Marine pellican hooks on port side bow lifelines.
Propulsion
Replaced UFLEX B73 Shifter Assembly.
Propulsion
Replaced Racor fuel filter w/ 12-T 10 micron filter. Disassembled and lubricated shifter assembly.
Hull / Deck
BOAT LAUNCHED!
Propulsion
Engine started without difficulty after layup. Changed primary Racor filter. Inspected secondary fuel filter. It was new.
Propulsion
Replaced raw water pump impeller.
Propulsion
Replaced Alternator belt and adjusted idle.
Propulsion
When preparing to change engine oil discovered about 2.5 quarts of engine oil in the bilge. Cleaned up and found oil pan banjo nut had become loose. Tightened nut and completed oil change using Shell Rotella 15-30 T4. Changed oil filter.
Propulsion
Replaced heat exhanger zinc anode.
Propulsion
Drained drive leg oil and removed leg for inspection and service. Replaced bellows and reinstalled leg. Filled unit with 6.5 quarts of West Marine 90 weight hypoid gear oil.
Propulsion
Sanded and primed drive leg w/ Zinc Oxide etching primer. Painted leg with Trilux 33 flat black antifouling paint.
Hull / Deck
Cleaned and destained hulls w/ oxalic acid hull cleaner.
Hull / Deck
Installed vinyl name and homeport on transom. "MAVIS - West Sayville, NY"
Sails
All sails cleaned and serviced. Genoa was restitched along long arm. UV luff tape was repaired 5 feet from the tack. Leech line cleat was changed to closed cleat w/ #3 grommets. Screecher had a small tear near clew and on leech. These were repaired. New tell tales installed.
Hull / Deck
Installed teak floor tiles in cockpit.
Ground Tackle
Installed Rocna Vulcan 15 on anchor roller. Replaced rode with 150' 1/2" nylon and 20' of galvanized chain. Old anchor and rode remain in anchor locker for secondary / backup.
Hull / Deck
Replaced 2 broken aft hatch latches.
Hull / Deck
Ground out and repaired gelcoat blisters on inboard side of port centerboard.
Plumbing
Replaced pressure water pump with West Marine 3gpm fresh water pump. Eliminated water tank selector valve and replaced with a T connection.
Electronics
Installed new Kenwood marine stereo receiver KMR-D768BT
Hull / Deck
Sanded and prepared bottom. Repaired voids and a longitudinal gelcoat crack. Ground out and faired. Barrier coated w/2 part epoxy paint. Painted using Woolsey Yacht Sheild - 3 coats.
Hull / Deck
Removed old vinyl names and homeport from transom and bows. "M/T Pockets"
Hull / Deck
Removed forward rubrail, cleaned and recaulked hull/deck joint using 3M4000 sealant
Hull / Deck
Removed caulking from hard bimini and coachroof and recaulked using 3m4000UV
Safety
Installed bilge pumps in each hull with electronic float switches.
Plumbing
Replaced Whale Gulper shower and bilge pump.
Electronics
Installed Garmin 942x GPS Chartplotter [serial number removed]
Electronics
Installed Standard Horizon GX2200 VHF/AIS Receiver and interfaced to Garmin with NMEA 0183
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Looking ahead
The next season.
Spring 2027.
Mavis is scheduled for her regular winter overhaul this winter, with cruising readiness planned for spring 2027. Upcoming work is kept separate from the completed entries in her maintenance history.
Discuss the spring seasonThe invitation
Her next chapter.
Perhaps it’s yours.
A conversation is a good place to begin. Ask about the boat, talk through a system, or arrange to see Mavis in person.
Speak with the captain captain@sailingmavis.com