Sure Shot Marine

Jeremyn Horsley  ·  Marine Electrician

San Francisco Bay Area

Services

Marine electrical troubleshooting, diagnostics, and corrective work for sailboats and powerboats.

Serving Alameda · Oakland · Berkeley · Richmond · Sausalito · San Francisco Bay Area marinas

What I Work On

DC Power

Charging & Battery Systems

Alternators, regulators, shore chargers, DC-DC charging, and battery bank performance verification.

Lithium Battery Conversions

LiFePO4 system design, BMS integration, alternator protection, and conversion from lead-acid.

DC Power Distribution

Main panels, busbars, fusing and overcurrent protection, switching, and circuit reorganization on systems large and small.

Solar & Inverter Systems

Solar array integration, MPPT controller setup, inverter installation, and system sizing for liveaboards and offshore passage makers.

AC Power

Shore Power & AC Systems

Inlet and distribution faults, GFCI and galvanic protection verification, grounding and bonding.

Single & Split-Phase AC

120V and 120/240V distribution, transfer switching, panel work, and onboard AC circuit troubleshooting.

Three-Phase Systems

208/480V distribution, three-phase motors, pumps and thrusters, and generator paralleling on commercial vessels and larger yachts.

Generators & Inverter/Chargers

Genset electrical faults, automatic transfer switches, inverter/charger integration, and load management.

Critical Systems & Documentation

Bilge & Critical Circuits

Bilge pumps, float switches, alarms, auto/manual logic, and corrective wiring.

Communications & Navigation

VHF, AIS, GPS antenna systems, feedline integrity, radio installation, and chartplotter integration.

Wiring & Documentation

Circuit tracing, labeling, termination upgrades, routing improvements, and correction of unsafe modifications.

System Mapping

Panel circuit index, battery and charging path, shore power path, and annotated photo set, delivered as a PDF.

Marine electrician diagnosing a flooded bilge compartment on a powerboat in the San Francisco Bay Area
Bilge compartment diagnostic — 1988 Kadey Krogen

Finding Gremlins

Most electrical problems on boats aren't so obvious. They're hidden in connectors, buried in bilges or bulkheads and invisible until something stops working at the wrong time.

A couple examples here: A failing solder joint caused an intermittent power glitch, and a corroded pin inside a connector. Both types of faults are intermittent, hard to find unless you know what to look for.

The instruments behind this work →

Close-up of failed solder joint causing intermittent power fault on marine electronics.
Intermittent solder connection fault
Corroded marine electrical connector causing intermittent fault.
Corrosion-driven intermittent fault

What's that smell?

A factory wire tie was never removed from this VHF during installation. At some point the steel core inside the plastic sleeve made contact with an exposed terminal.

The current through the wire tie generated enough heat to melt not only its own plastic cover, but the insulation to the negative VHF wire, leaving bare copper exposed.

Luckily, this only melted the insulation of a short section of wire. It could have been much worse.

Factory wire tie on VHF radio power cable with steel core contacting exposed terminal.
Wire tie contacted 12VDC.
Melted wire insulation on VHF radio power cable caused by resistive heating through wire tie steel core - fire hazard found during marine electrical safety inspection San Francisco Bay Area
Result - melted insulation dripping off the wire.

Rates

Diagnostic & Corrective Work hourly

Troubleshooting, repair work, consulting, design, and new installations.

$150 per hour, two-hour minimum on site.

All work billed at a single hourly rate. The minimum covers the trip and setup to your boat, so there's no separate trip charge within the central East Bay Area.

All work performed to ABYC standards using marine-grade materials.

Sample Report PDF

Here is an example of a typical job report with the root cause identified, and other findings along the way. Issues ranked by severity, annotated photos, and a prioritized work scope that you can plan around.

View Sample Report