Seaboard Marine - Custom Marine Diesel Repower Specialists

Repower Articles

Bossea - Repowering a Trojan International 10 Meter

ARTICLE NAVIGATION - AUTHOR BOB VARGO
Introduction	On the Move	Selecting Engines	The Detail	Sea Trial

MANDATORY

Replace Twin Disc gears with ZF 220A gears at 1.533:1

Replace 1 3/8 inch diameter shafts with 1 ½ inch diameter shafts

Replace cutlass bearings sized for new shafts

Replace 18x20 three-blade props with 18x22 three-blade props

Enlarge raw water thru-hull intakes and replace shut-off valves

Enlarge exhaust system to allow for greater flow

Enlarge air intake system

Fabricate new engine mounting brackets to fit existing stringers

Replace engine instrumentation on bridge

ELECTIVE

Replace Onan MDJE genset with MDKAL genset and sound shield

Install Comnav 1101 Autopilot

Install dripless PSS shaft seals

Install turbo boost gauges

Replace Dahl fuel filters with Fleetguard fuel filters

Replace all fuel lines and fittings

Install oil drain hoses on engines, gears, and genset

Install fresh water flush system for engines and genset

Install Wolverine block heaters on engines

Move batteries aft under cockpit sole to make more room in engine compartment

Install breaker switches leading to house 12V panel and each engine

Relocate thru-hull for holding tank pump out to a more convenient location

Paint floor of engine room between stringers with epoxy paint


Fresh water flush plumbing - New fittings and hoses were attached to the raw water strainers and connected to a cockpit- mounted manifold to allow fresh water flushing of both mains and the genset.


Enlarged raw water intake - The original plan was to reuse the existing raw water intake system. It would have been marginal if it was in perfect condition, but would have worked. When checking its condition a rock-hard coral growth was found in the valve. New, larger valves would be installed instead.	New engine instrumentation - New Yanmar gauges were installed in the original Trojan instrument panel.


Enlarged exhaust - The external underwater exhaust ports had to be enlarged to take the greater capacity of the 6LYAs. The neck into the built in muffler had to be enlarged also.