Unicorn engine?

Skyhead22

Seaman
Joined
Jun 7, 2016
Messages
60
I have a mercury outboard 50 horse. Had it checked out once my local boat mechanic said hes pretty sure it has a 75 horse power head somebody had swapped at some point. Not sure if this is possible? I know it pushes my 16 foot polar Kraft about 35 it screams for a John boat being steering console front and rear decks. Haven't been passed by another Jon boat in 14 years with it.

My main question is, are all older Mercury's this amazingly reliable? Ive had this boat end engine for 14 years I've never winterized it once. Never rebuild carbs. I out a new impeller for water pump in it one time. Found out it was bad after engine overheated and died, wouldn't turn over. It cooled down. Paddled into shore, got a new impeller in it and away I went! I've changed plugs twice in 14 years.

My transom has rotted out I've replaced it, bilge pump and aerator lines have rotted and ive replaced them, had to replace carpet twice. BUT, the engine to this day still rubs like a top!

Every single spring I go out to the boat, same gas as last year, nothing winterized, it fires right up, might stumble for a few seconds just at first but runs like a champ all summer. Do it all over again.

It starts up faster than I can flick the key over. I shot this video tonight I'm replacing the interior yet again. Is it common for the engine to outlive the boat this much? I'm in no way nice to it, I hit logs, run it onto sand bars, WOT all day, so on.

I use the cheapest gas available every time nor ally 87 octane 10% ethanol. I always mix 50:1 with either quicksilver or Pennzoil.
 

Skyhead22

Seaman
Joined
Jun 7, 2016
Messages
60
I ask this because I have other boats with inboard engines, friends with outboards and they are all so damn temperamental... miss one little thing. Don't maintenance this or that and the dang thing breaks down.
 

Sea Rider

Supreme Mariner
Joined
Sep 20, 2008
Messages
12,345
Have you ever tached that nice 50 while wot boating as currently loaded ? if not, you should. Engine will appreciate it...

Happy Boating
 

82rude

Rear Admiral
Joined
May 8, 2012
Messages
4,082
You got a good one.I like mercs but 2 of the worst motors I ever owned were mercs.
 

Grub54891

Admiral
Joined
Jun 17, 2012
Messages
6,175
Some of the best motors out there are the ones nobody messes with. The factory set them up a certain way for a reason. There are always someone who thinks fiddling with this or that will make it better, nope..........Don't let your friend look under the hood.........
 

Teamster

Lieutenant Commander
Joined
Nov 8, 2010
Messages
1,923
You could check the HP by serial number on the block,....
 
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