QT1
Active Member
- Oct 20, 2016
- 645
- Boat Info
- 1990 350 Sundancer, "Quality Time II".
- Engines
- 454 Mercruisers, performance parts modified by PO.
The title says it all. Any suggestions? Thanks.
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You must have been reading my mind: First and foremost, the risers and manifolds. It's just been disturbing that the last 2 owners, who I now know, didnt keep any maintenance records, so I have started from scratch with all maintenance procedures and dates.You’ve got the 5.7’s and it sounds like you are not too sure about the age or condition of the exhaust.
Seems like the boat may be new to you.
If the whole exhaust is raw water cooled, just to be safe:
My advice would be to just get a new OEM Mercruiser E coated exhaust kit and start fresh. The 5.7’s are really common and as a result they are about the most competitively priced exhaust systems out there.
Too easy to lose a motor because of water intrusion through the exhaust.
You can usually find a sale that will get you the whole kit for about $600 a motor.
If the manifolds are cooled by anti-freeze then I would replace the Risers/Elbows (very quick and easy job on your boat) for peace of mind.
Don’t feel bad. In the summer of 2016 I picked up a 2005 18’ Maxum Bowrider with a 3.0 Mercruiser in it on a trailer for my kids to use. Boat ran good with normal temp so I put off doing the exhaust until the Spring of 2017. I was stupid and extremely lucky at the same time. The old exhaust was a mess when I removed it. Very stupid on my part. Lucky I didn’t ruin the motor.You must have been reading my mind: First and foremost, the risers and manifolds. It's just been disturbing that the last 2 owners, who I now know, didnt keep any maintenance records, so I have started from scratch with all maintenance procedures and dates.