Want to learn about Stern drives and Inboards

ShafferNY · Mar 19, 2003

Hey everyone. It's been a while since I've been to this site. I usually hang out in the Outboard section. I want to learn about Stern drives and Inboards(how they are set up, different makes and models,etc... pretty much anything you can throw at me), when it comes to these I know diddly-squat! and I'll be the first to admit it. I know alot about Outboards, and alot about cars and trucks, I've rebuilt several engines. Some of the questions I have: Do Stern drives and Inboards have transmissions? How is the cooling system setup? What is there for an exhaust? Thanks, I hope these types of questions don't seem to mickey mouse. Chris

Lark40 · Mar 19, 2003

Re: Want to learn about Stern drives and Inboards

On the basic Mercury and OMC sterndrives I've owned: 1. No transmissions. The drive units have universals and are similar to outboards. 2. Cooling is raw seawater on most sterndrives. Two water pumps, one in sterndrive and one on engine. 3. Exhaust is handled by special manifolds and risers attached by flex conduits into a U-shaped exhaust pipe, which feeds through the transom into the sterndrive. Inboards are a different animal; someone else can tell you about them.

Trent · Mar 19, 2003

Re: Want to learn about Stern drives and Inboards

Yes...Some actually did have tranmissions. Used the "Borg Warner Velvet Drive"

ShafferNY · Mar 19, 2003

Re: Want to learn about Stern drives and Inboards

Thanks Lark40, that's the kind of information I'm looking for. If there are any good sites, I'd love to see them. Like I said, I know nothing when it comes to these things.

boatingfool · Mar 19, 2003

Re: Want to learn about Stern drives and Inboards

Here is my question, What is the difference between inboard and sterndrive?? A lot of people seem to use those words interchangeably but I know there is a difference.

snapperbait · Mar 19, 2003

Re: Want to learn about Stern drives and Inboards

Here's your Inboards.. http://www.glen-l.com/inboard/direct-drive.html http://www.glen-l.com/inboard/8hdwdescr.html

ShafferNY · Mar 20, 2003

Re: Want to learn about Stern drives and Inboards

A stern drive is a automotive type engine inside the boat with a lower unit similar to an outboard on the stern of the boat, hence stern drive sometimes refered to as inboard/outboard. A inboard is an automotive type engine inside the boat and the only thing on the outside of the boat is a shaft going through the hull with a prop on the end of it. It also uses a rudder for steering. Someone correct me if I'm wrong.

magster65 · Mar 20, 2003

Re: Want to learn about Stern drives and Inboards

You got it.

Doug Durako · Mar 20, 2003

Re: Want to learn about Stern drives and Inboards

That V-drive drawing on Snapperbait's second web site looks pretty wild! Never knew this animal was out there. So, some engineer woke up one morning and said "let's put an engine in the boat backwards and use belts and pulleys to run the prop drive shaft the other way." It was probably the same guy who decided to run the OMC electra-shift drive through the stern of the boat using a big rubber sock (boot) to hold it and then raise and lower the entire engine to trim the drive in or out. Guess it all made sense to somebody at one time or another.

boatingfool · Mar 20, 2003

Re: Want to learn about Stern drives and Inboards

ShafferNY Thanks, I have had that question for a while.

chas285 · Mar 22, 2003

Re: Want to learn about Stern drives and Inboards

I am looking for a repair manual for inboard engines with an emphasis on counter rotating engines. Anyone know where I can get one?

Want to learn about Stern drives and Inboards

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