Peanuts
New member
One day we will get this one sorted - hopefully!
As you have mentioned nearly all of the items have been checked, was this done by removing the items and inspecting or by a type of in situ check.
As the engine sometimes works OK I don't think it is an item that is causing the problem but more of an interconnecting one, eg pipework.
The way I look at these types of problems is sometimes it is easy to overlook the basics, so on that note I would start at the water intake on the outdrive, if need be remove the 's' type hose to make sure it is not collapsing in any position. The I would flexi endoprobe from the transom water inlet up to the oil cooler, checking for damaged internal pipework and debris, once reaching the oil cooling checking for restrictions. Of course most people won't have flexi endoprobes so I would be dis-connecting the water pipe from the oil cooler and inserting a hose pipe with water on pushing it in until it appears at the transom, this will ensure that part is clear. I would then check the actual oil cooler (as VP mentioned in post 5). Then I would check the pipe work between oil cooler and pump/strainer. That area is now 100% checked.
The reason for this overkill is for a reason, I remember once we had a problem that had us baffled, it involved the pressure not being released from an item, units were changed until there was nothing left to change, apart from the pipe work, everything looked OK, nice shiney braided flexi-hoses. We x-rayed one of the flexi-hoses and there was the problem, the inner part completely deformed, the pressure from the pump could push it's way through but did not have the force to release once the pump was off. Even when we knew where the problem was no-one could see any damage on the outside, so what I am saying is don't assume - check it.
I look forward to the next installment of your on-going problem.
As you have mentioned nearly all of the items have been checked, was this done by removing the items and inspecting or by a type of in situ check.
As the engine sometimes works OK I don't think it is an item that is causing the problem but more of an interconnecting one, eg pipework.
The way I look at these types of problems is sometimes it is easy to overlook the basics, so on that note I would start at the water intake on the outdrive, if need be remove the 's' type hose to make sure it is not collapsing in any position. The I would flexi endoprobe from the transom water inlet up to the oil cooler, checking for damaged internal pipework and debris, once reaching the oil cooling checking for restrictions. Of course most people won't have flexi endoprobes so I would be dis-connecting the water pipe from the oil cooler and inserting a hose pipe with water on pushing it in until it appears at the transom, this will ensure that part is clear. I would then check the actual oil cooler (as VP mentioned in post 5). Then I would check the pipe work between oil cooler and pump/strainer. That area is now 100% checked.
The reason for this overkill is for a reason, I remember once we had a problem that had us baffled, it involved the pressure not being released from an item, units were changed until there was nothing left to change, apart from the pipe work, everything looked OK, nice shiney braided flexi-hoses. We x-rayed one of the flexi-hoses and there was the problem, the inner part completely deformed, the pressure from the pump could push it's way through but did not have the force to release once the pump was off. Even when we knew where the problem was no-one could see any damage on the outside, so what I am saying is don't assume - check it.
I look forward to the next installment of your on-going problem.
