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Markinaboat

JD3 oil pressure

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Hi all,

 

Someone I know has just bought a boat with a JD3 in. A boat mover is bringing it back for her and she'd like to let him know what the correct oil pressures should be (hot & cold). Also, is it standard 15/40 oil for top up's?

 

Many thanks

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found this on waterways world forum

My JD3 engine (700 hrs) takes 10 secs to reach its oil pressure of 45psi cold engine(35 HOT)every time its started.I have changed the oil filter twice using the rec FramPH20 and the Beta supplied Fleetguard LF 678 to no effect.The problem seems to lie with the lack of an anti-drain valve in the oil filter,briefly fitting a non standard purflux LS867B(with anti-drain valve)resolved the problem.Am I to use the rec filters or use a non standard.I am sure that if my car engine had shown this characteristic it would have been destroyed quite quickly.

Asked by: Michael Stapleford  | 9.24pm, Friday 23 January

 


 

Readers say:

I have the same. Crosland filters I originally used didn't cause this but in recent years most filters I've used, such as the Fram ones mentioned, have done so.
Like you I am not happy with this, and think that filters with anti-drain valves may be the answer.
The only other cure I can think of is relocating the oil filter to a remote location where it can be placed upright. I did this for a BMC 1800 engine on a previous boat, using a kit a friend got me. I don't know where he got it though.

Trackman  | 2.14PM, Friday 4 October

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Its about 45 when cold. When hot its speed dependent and can be as low as 15 to 20 at idle (450 rpm).

A good 15:40 is correct but I would avoid cheep stuff, this is a proper heavy duty engine with some hefty moving parts and deserves a good oil. It likes the modern oils rather than API CC stuff, but Morris advised me to avoid some very high additive oils.

 

It does take a while for the oil pressure to get up and the engine sounds unhappy before the pressure is up. This is probably a bigger issue than John Deere anticipated due to the slow tickover speed.  Malpas online do an equivalent filter with an anti-drain back valve that fixes this problem nicely, but you will need to think carefully about what this does to the dipstick reading.

 

...............Dave 

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As a rule the Fram filters are poor quality despite being the largest manufacturers. Sadly Crosland are no more, they were excellent.  http://oilfiltercrossreference.com/ is handy.

Yes, always use a filter with the rubber anti drain back flap valve. visible through the holes.

Start up from cold is when most engine wear and damage occurs.

Use clean oil from a regular manufacturer, Morris 15W40 is good stuff and cheap. Thinner oils circulate faster, that matters more than just oil pressure. A well worn engine may have very little pressure when hot but as long as the oil is circulating it will run OK for a long time. Its when the oil pump is worn out that failures occur.

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