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  1. Wet muffler/mixing tank combo replacement - Perkins 4.236

    Gear & Maintenance
    I noticed the combo wet muffler/mixing tank on my boat is beginning to leak. The boat uses a Perkins 4.236 diesel. Attached are some photos of the set up, which appears to be a unique set-up for this vessel. The muffler has three ports, engine exhaust in at the bottom, salt water from the heat...
  2. Black smoke in exhaust while in gear > 2000RPM

    Calling all mechanics for ideas :) I have a 1990 Catalina 30 with a Universal M3-20 (18hp) engine. I discovered about 3 seasons ago if you run the engine in gear over 2000 rpm there is black smoke/soot/particulate matter in the exhaust. Since then I've only run the engine up to 2000 rpm and can...
  3. Oil from engine exhaust.

    My boat has a Yanmar 8HP 1GM10, pretty great condition and up until now i would swear this engine is bulletproof. Recently i noticed that after starting, the engine spit out a black discharge from the exhaust for about the first 5 - 10 seconds of running. After that, it goes away and doesn't...
  4. Intermittent Raw Water Flow Issue with Perkins 4-108

    Hello: Intermittent raw water flow issue with Perkins 4-108: Normally my engine has no water flow issues. However, this year, I have gone to start the engine twice and had no raw water flow from the exhaust. Both times it happened after sailing (but only once was the boat healed over...
  5. Overheating, cooling or exhaust system issue?

    Gear & Maintenance
    Just when I had my A4 running like a top she has blessed me with another mystery problem. Here is the rundown: Last week I was heading out for a quick little ride. On my way out of the harbor my boat started acting strange and engine speed started fluctuating (around 1500-1700rpm.) All of a...
  6. Exhaust Hose Access?

    I have a 1982 C27 with an Atomic 4 engine. The exhaust hose that attaches to the transom exhaust port is probably original to the boat, and my mechanic says it is leaking and needs to be replaced. However, there is no way to access the hose without cutting through the aft lazarette or transom...
  7. Yanmar Exhaust Elbow

    I am searching for Yanmar part #129171-13550, a mixing elbow for a Yanmar 3JH2-TE. I thought the hard part would recovering from the shock of the quote I was given for the work to be done. Once I wrapped my mind around that and gave the go-ahead, I found that there were no such animals in the US...
  8. Universal M-25 Exhaust port underwater?

    Hi All, We've recently had our inboard installed on our 1986 Catalina 27 Tall rig and are very excited to start using our new (to us) sailboat. I've noticed that the exhaust port, however, is just at the waterline when we are sitting, and when we are underway it drops to just underneath the...
  9. Yanmar SB8 exhaust riser

    General Discussion (sailing related)
    Hello..I have a 1980 CS-27 sailboat. THe mixing chamber for water/exhaust has a hole in it. I patched it 4 years ago and it's still holding but I want to replace the part as I will soon sell the boat. I have a hard time finding any info on the SB8. Does anyone know where I can get this part...