This should probably be in the confessional. It's a tale of bad mechanics and not paying attention.
on my boat is a 10hp Volvo
MD2101 2 cylinder. When I bought the boat she started after a couple of revolutions of the crankshaft and never gave a lick of trouble. Over time and neglect things change and I ignored a lot of symptoms for a long time. We've probably put 300 hours of motoring on it in the last 5 years.
- It was taking longer to start on first start of the day
- After a 3 week lay off it needed to be bled or it wouldn't start
- She started producing black smoke, especially at start up - lately the black smoke contains heavy black soot (gunk) that pukes out he back until she is warm
- Throttle response is very slow
- Temperatures rose, especially under heavier loads - i.e. fouled prop and towing another boat
- We started to lose fresh coolant
was basically change oil
every 6 months. Change the fuel filter
once a year.
Well I came back from a 4 week layoff and none of my old tricks would work. She decided that it was time to take care of her and do some maintenance
So I am a little PO'd that she won't keep trudging along but I am more pissed at myself for not having taken care of the signs earlier or properly.
- The need to bleed means air is getting in the fuel
system - suspect flexible fuel
- The black smoke could be injectors and/or a fouled exhaust
- The hard starting could be fuel delivery
, injectors, valve adjustment or fouled mixer
- The losing of coolant
over time is probably related to the ancient heat exchanger
- The temperature could also be related to the heat exchanger
- The temperature could also be related to the thermostat
- Pulled the injectors - some dry carbon but not really noticeable fouling.
I like to fix things in a system as they go down. Then when I have fixed everything in a system I know when it was fixed and I can eliminate the system from future troubleshooting.
- Drain the fuel tank
, pull it and clean it
- Exchange injectors (~$280 new and ~$160 exchange each - ouch)
- Replace all rubber fuel lines on the fuel system - eliminate air leak potential
- Replace all crush washers in the fuel delivery
system high pressure side
- Pull exhaust
mixer and inspect/clean/repair or replace (~$400 - ouch)
- Pull the inlet housing and inspect /clean/repair as necessary
- Adjust valves
- Remove heat exchanger and clean the core
- Replace thermostat and heat exchanger pressure cap
- Change oil
- Change fuel filter
- Change raw impeller
- Clean up raw inlet system for blockages and barnacles
need to be ordered and they will likely be at least 2 weeks getting here. In the meantime I have a few jobs to do but unfortunately no sailing.
I will post any updates as I work the list.
Any other ideas are welcome.