Recent content by dpb

When you say spark plugs wet, you mean petrol or water?

Got back on this today before the rain returned! My efforts at pressure testing the water jacket worked ok but didn't tell me much other than it definately was leaking. So off with the inlet manifold. Pictures attached. The gaskets are still in place on the heads as rain stopped play but it...

We had a boat with cracks like that repaired under warranty as it was down to substandard construction. I would certainly walk away from the one you are looking at. I have had 20 plus year old boats most of my boating life and never came across such cracks except for the one stated above.

Ha.... obvious with hindsight!

Blimey, you are braver than me! Cleaning barnacles fine of course but seals and oil changes on a tidal window..........! Hope it goes well!

Does this help? https://www.iims.org.uk/wp-content/uploads/2021/07/Sealine-C39.pdf

You aint looked very hard!!! Prestige 450, Sealine C39 & Sealine SC35 articles in Motor Boats Monthly (07/13) | eBay The seller bought my entire collection and has been selling them individually ever since!!!

Check the water inlet valve at the hull is open? Also that the pipe from inlet to pump has not got obstructed or collapsed under suction.

Thanks for all the helpfull comments. The engine is raw water cooled. I will do compression tests also. I have just been looking at the photos I tool during strip down. No sign of emulsified oil anywhere. The oil filter was clearly not new and I would have noticed if that was full of emulsified...

No impeller as it is in the outdrive leg which is not present. Anyway two oil changes with a couple of minutes run after each change has left me with clear enough oil so time no longer of the essence. I want to try pressure testing the cooling system before diving in. Just figuring out how!

Closed cell 2 pack expanding foam.

The boat is on trailer. No leg fitted. Hose connected to coolant inlet on Bell housing. Tap opened just enough for adequate flow. Set up tested without engine running a week before engine test. Also for engine test, water on before engine start. The configuration of the elbows seemed to me to be...

I have decided to put new oil and filter on to run the engine without cooling for a minute or so to flush emulsified oil out, maybe change both and do again. Should take the urgency out of dealing with it while I ponder.

Yesterday was first start of the engine after a full rebuild, started and ran fine. After running for a few minutes stopped it to check things over. Found that the oil is now mayonnaise so clearly water getting to it. It is a part of a project boat which serves mainly to keep me busy during...

I have recently completly replaced all the woodwork on my project boat which is constructed in a similar way to yours. As I removed the floor it became clear that water had got into the structure with most of the stringers and foam being water logged or rotted. So I replaced the lot. I recommend...