BobS
  • BobS
  • Advanced Member Topic Starter
2018-04-18T22:16:26Z
Apologies for long subject heading.

My 285 has developed a leak in the raw water circuit of the Yanmar 2YM15 engine,at the t-piece leading to the shaft lubrication line from the anti-siphon down pipe despite tightening the jubilee clips as tight as possible. Taking this out, I found that the 1/4 BSP stainless steel t-piece has an external diameter of ~12mm and the internal diameter of the Variopress HA152 hose which was attached to it is 19mm. Major engineering nonsense! Photo attached.

IMG_1930.JPG

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No wonder it has become an acute on chronic leak and presumably the narrow t-piece has been restricting flow. (The larger hose size is needed to fit the other parts of the circuit.)

Has anyone had a similar problem? Where might I find a 1/2inch BSP fitting which has a 1/4inch "T" or is there another solution?

Thanks

Bob Simpson

"Teal" Parker 285 No74

BobS
  • BobS
  • Advanced Member Topic Starter
2018-04-22T20:41:28Z
Update: Friendly marine engineer has turned a new part with 1/4 BSP side hole on his lathe and all is well in the world. Bob S