Wave34
Petty Officer 1st Class
- Joined
- Oct 17, 2017
- Messages
- 336
Chaparral 260 Volvo Penta 5.7Gi-D / Duoprop SP-SM
I can't find the problem.
The boat has been working fine last year. I winterized it like usual, and removed the outdrive for inspection and to change an oil seal.
I reassembled everything this spring, and went last week end for the first ride of the year.
After 10 minutes of idling, waiting for my friend, the alarm started to beep. The oil pressure was normal, the engine temperature was normal. Since the vital signs were OK, I thought it was something of less importance. So I idled another 10 minutes before heading back to the dock and turned off the engine.
When I opened the hatch, there was smoke from the riser coupling starting to bubble and melting a bit.
After inspection, there was no water being sucked by the RWP. So I put the boat back on the trailer and went home.
I found that when running on the ear muffs, the engine will overheat, but if I run it on the flush port (blue cap), it won't (I ran it for 30 minutes on the flush port at 165*).
I had a new impeller in it. It is still intact, not melted. I put the old one in, just for test. No change.
I installed clear sections of hoses on the RWP, and with the ear muffs, there is no water, but with the flush port, I see some water.
There is no blockage at the inlet hose. When I put the garden hose to the flush port without starting the engine, water goes out the intake of the leg, so it looks normal. There is no leak inside the boat or at the short hose near the gimball.
Now, I start suspecting that the oblong oring around the water passage has moved and air is being sucked from there. I installed an original Volvo oring with Permatex2 to hold it in place.
I won't have time to pull the outdrive before Thursday, but I would like to know what you guys thinks is happening.
And now, my high pressure pumps starts to whine. May be due to the lack of water flow to cool it off. I hope it is not damaged...
I can't find the problem.
The boat has been working fine last year. I winterized it like usual, and removed the outdrive for inspection and to change an oil seal.
I reassembled everything this spring, and went last week end for the first ride of the year.
After 10 minutes of idling, waiting for my friend, the alarm started to beep. The oil pressure was normal, the engine temperature was normal. Since the vital signs were OK, I thought it was something of less importance. So I idled another 10 minutes before heading back to the dock and turned off the engine.
When I opened the hatch, there was smoke from the riser coupling starting to bubble and melting a bit.
After inspection, there was no water being sucked by the RWP. So I put the boat back on the trailer and went home.
I found that when running on the ear muffs, the engine will overheat, but if I run it on the flush port (blue cap), it won't (I ran it for 30 minutes on the flush port at 165*).
I had a new impeller in it. It is still intact, not melted. I put the old one in, just for test. No change.
I installed clear sections of hoses on the RWP, and with the ear muffs, there is no water, but with the flush port, I see some water.
There is no blockage at the inlet hose. When I put the garden hose to the flush port without starting the engine, water goes out the intake of the leg, so it looks normal. There is no leak inside the boat or at the short hose near the gimball.
Now, I start suspecting that the oblong oring around the water passage has moved and air is being sucked from there. I installed an original Volvo oring with Permatex2 to hold it in place.
I won't have time to pull the outdrive before Thursday, but I would like to know what you guys thinks is happening.
And now, my high pressure pumps starts to whine. May be due to the lack of water flow to cool it off. I hope it is not damaged...
