Clyde_Wanderer
Well-Known Member
Does anyone know if the Perkins M20 10306 3cyl engine has an engine annode and if so where is it?
Its not the Parama but almost identical.
Thanks, C_W
Its not the Parama but almost identical.
Thanks, C_W
Perkins engine annode?
- Thread starter Clyde_Wanderer
- Start date
Clyde_Wanderer
Well-Known Member
Bloody hell, someone out there must know!
wotayottie
Well-Known Member
dont know if this is any help but the Volvo 2030 that I have and which is a rebadged Perkins 3 cyl 29 hp machine doesnt have an anode.
NormanS
Well-Known Member
The Volvo MD22, (which is really a Perkins Prima), that I have, doesn't have an anode. Or if it does, I've never found it.
Hoolie
Well-Known Member
Likewise for my Perkins Prima. I have always assumed an anode is not necessary because this engine is generally isolated from battery negative. I believe it would be so for any earth isolated engine.
Clyde_Wanderer
Well-Known Member
Thanks guys.
My engine is, I am almost certain the same as the Volve 2010 or 2020 and is around 18hp.
I dont understand about the engine earth/negative, most of the negitaves on mine are all connected to a common earth terminal on one of the engine mounting brackets, surely the alternator must be earth to the engine block via its mounting points and casing?
The ignition controlled fuel shut off solnoid and some other electrical componants ie, the temp and oil sender switches are earth via the block which I am sure is standard practice on most engines.
C_W
My engine is, I am almost certain the same as the Volve 2010 or 2020 and is around 18hp.
I dont understand about the engine earth/negative, most of the negitaves on mine are all connected to a common earth terminal on one of the engine mounting brackets, surely the alternator must be earth to the engine block via its mounting points and casing?
The ignition controlled fuel shut off solnoid and some other electrical componants ie, the temp and oil sender switches are earth via the block which I am sure is standard practice on most engines.
C_W
Spyro
Well-Known Member
I also don't see how an engine can be earth isolated but I stand to be corrected.
john_morris_uk
Well-Known Member
The engine block is not isolated from battery negative on these engines, but on the Volvo 2010/20/30 series the propshaft and gear box are isolated from each other. The Volvo versions do not have anodes fitted.
If the gearbox and shaft are isolated the argument then becomes one of whether you connect the battery negative to your cathodic protection. I don't and can see several good reasons why I shouldn't.
On the raw water side, you need metal differences on the cathodic scale for electrolysis to take place and I guess that the designers decided that there was no significant problem that required an internal anode in the heat exchanger.
With the gear box isolated, the cathodic protection on the shaft and propellor assembly works without any potential (pardon the pun) interference from the ship's batteries etc.
If the gearbox and shaft are isolated the argument then becomes one of whether you connect the battery negative to your cathodic protection. I don't and can see several good reasons why I shouldn't.
On the raw water side, you need metal differences on the cathodic scale for electrolysis to take place and I guess that the designers decided that there was no significant problem that required an internal anode in the heat exchanger.
With the gear box isolated, the cathodic protection on the shaft and propellor assembly works without any potential (pardon the pun) interference from the ship's batteries etc.
john_morris_uk
Well-Known Member
[ QUOTE ]
I also don't see how an engine can be earth isolated but I stand to be corrected.
[/ QUOTE ]A very few engines are built with starters and alternators etc that have separate earth returns and which have the block isolated from the battery negative, so they do exist.
I also don't see how an engine can be earth isolated but I stand to be corrected.
[/ QUOTE ]A very few engines are built with starters and alternators etc that have separate earth returns and which have the block isolated from the battery negative, so they do exist.