We swapped out for a 25hp 4stroke merc on the big boat back in 2007.
Around 1000hrs on her and we are very happy with the engine
- Quiet: First time we stopped for a bridge, we thought it stalled because we couldn't hear it. It's very easy to converse in the cockpit
while motoring without raising your voice.
- Efficent: It gets twice the MPG compared to the old 2 stroke
- Starts Quickly: This is an EFI. Not sure if the smaller engines are carburated still.
- Negligible maintenance
(oil changes, 1 spark plug change)
Issues so far:
- At around 500hrs, the plugs did get fouled out from too much idling. The local service
rep, looked at it and told me the issue without any charge. He said most people assume it doesn't happen with 4strokes but if you are tooling along in no wake zones it can eventually happen. Now every few tanks
we put in some of the cleaner and we also open her up for 5-10 minutes at the end of a days run to clean things out. The issue has not reappeared.
- This spring we had trouble starting her. I had disconnected the fuel
line and ran her dry, thinking this was best. It took a while to get fuel
thru the system but once we got her started there has been no issues since. In the future, I will run some stabilized non-ethonal gas in before putting her to bed
Mercury parts and assistance: Abysmal.
- It's next to impossible to get past the advertisement part of the website.
- They have issues determining what engine
I have when I tell them it's a 2007 25hp EFI. I give them the model number and they still had trouble and even argued with me (I included a picture of of the model number on the engine).
- Parts basically have to be ordered thru a local rep (I'm talking about the zincs not something complicated)
Still a good engine and happy with it ($5k for an entire brand new drivetrain beats the heck out of $10-20k to replace the drivetrain of an inboard diesel). If the service
was even moderately better, it would be awesome.