msimms
Well-Known Member
Following on from Part Two we went out Saturday morning to see what effect the reconditioned injectors made. There was a notable improvement. Revs were up to 3600 from 3400 and there was no discolouration seen in the exhaust gasses in the water. The revs are still down on the starboard engine which manages 3800 (with port at 3600). There was still white smoke, about the same as before. The transom still got soot on the port side but noticably less than before.
Friends who came out with us on their boat noticed that that our exhausts looked different. When observed from the bathing platform looking down the bubbles looked much the same. Peering over the platform the bubbles exiting the port engine look to be coming not only from the exhaust but from all around the leg. I took a short video from the lock to try and show the difference but couldn't really get the right view. You can see a difference though. The engines had only just been started so there is a little smoke in the video but they've always done that when cold with no load.
I've looked at the workshop manual and can't see anywhere that the exhaust can leak from other than the bellows. However, this is a brand new bellows. It was replaced as the previous one had come off from the leg side. We think that the jubilee clip had failed.
I'm now wondering if something could have got inside the exhaust whilst the bellows was off and caused a partial blockage. When we went out for the first trip the pressure built such that it's now split the new bellows. Anyone think this is a possibility?
Would using the boat in this condition for a couple of shortish trips - at reduced revs of say 3000 - be okay? Temperatures and pressures are all good, both engines sound the same, it's now just a dirty transom and a little white smoke.
Friends who came out with us on their boat noticed that that our exhausts looked different. When observed from the bathing platform looking down the bubbles looked much the same. Peering over the platform the bubbles exiting the port engine look to be coming not only from the exhaust but from all around the leg. I took a short video from the lock to try and show the difference but couldn't really get the right view. You can see a difference though. The engines had only just been started so there is a little smoke in the video but they've always done that when cold with no load.
I've looked at the workshop manual and can't see anywhere that the exhaust can leak from other than the bellows. However, this is a brand new bellows. It was replaced as the previous one had come off from the leg side. We think that the jubilee clip had failed.
I'm now wondering if something could have got inside the exhaust whilst the bellows was off and caused a partial blockage. When we went out for the first trip the pressure built such that it's now split the new bellows. Anyone think this is a possibility?
Would using the boat in this condition for a couple of shortish trips - at reduced revs of say 3000 - be okay? Temperatures and pressures are all good, both engines sound the same, it's now just a dirty transom and a little white smoke.
