Perkins M115T - Block Heater - for 6 Cylinder Engine Models

TPD1317e Chapter 10
Page 65
10.2 Block Heater - for 6 cylinder engine models
A mains powered cylinder block heater may be tted to keep the engine warm when the boat is stored in low
temperatures. A suitable heater may be ordered as part of the engine assembly, or may be tted later.
Figure 2 shows the connection points, the supply being taken from a hole in the cylinder block tapped 1/4” - 18
NPSI and the return from a hole in the cylinder head tapped 1/2” - 14 NPSI.
For most purposes a 500W heater will be satisfactory. If the heater is ordered at the same time as the engine,
it will be attached to the engine. If tted later it may be more convenient to mount the heater on the engine
bearer.
The hose connections to the block heater must be of a radiator or heater hose quality, and must be installed
so that chang will not occur.
Caution: The hoses connecting the block heater to the engine are part of the closed engine cooling system.
Failure of a hose will lead to the engine overheating!
Return from
block heater
Supply to block
heater
Block heater
Connections are to
suit 5/8” bore hose
Figure 2 - Block heater connection points.