Inboard vs Inboard

[Phillip]

The prop has to be protected from marine growth.

In my case, with an inboard, I have to jump in the water once to do this.

I use the thinnest black rubbish bag I can find and wrap it around Seaka's prop.
Care must be taken that none of the bag can flap against the hull and degrade your anti-fouling.

The reason I use the thinnest bag is that I tie a 3mm cord to the knot in the bag so I can rip off the bag from the cockpit before I go sailing etc.
A thick bag will weld itself to the prop blades when you try to pull it off.

With an outboard you could do this from the cockpit without having to go into the water.

I have done this because in the Camden Haven River it can take as little as two weeks to have a completely fouled prop.

Sent from Gloucester Passage at the Shaggers [SICYC] get together.

[SeaLady]

Yes, Sea Lady has had her 8HP 2 stroke outboard in the water for 3 years or so.
Makes life easy but it has reached the end of it's life.
The leg has been antifouled and needs to be pulled out and scraped for barnacles every few months.

Am thinking about replacing with a 4 stroke motor which is much heavier and possibly having it on a custom built frame on the stern.
It would be on the starbord half with a boarding platform and ladder on the port side.

Has anyone done this?

It would certainly be quieter and tilting an engine is surely easier than lifting.
I am now 56 years old and a 45 kg engine is too much for me to woman handle alone as I approach my advanced decrepitude.


p.s. SeaLady is at Fenwicks getting her storm damage fixed and normal maintenance.
So this would be a perfect time to sort out the engine.

[Ianb]

Outboard stowage.jpg (81.74 KiB) Viewed 6570 times

Diana, Firstly you are a youngster. Secondly brute force can be replaced by simple engineering. Take a look at the attached photos. They are typical of systems that lift the motor straight up for dry stowage. You can rig a lifting system from the backstay, or have a simple lifting frame made up with some pulleys, etc. The support system is removed, and the motor lowered into the normal position. As stated here before, if the exhaust relief is piped below water level, the noise and fumes of a well install are much reduced. Far better than transom mount!

$_57.JPG (83.52 KiB) Viewed 6570 times

[RodM]

I had a 5hp 4 stroke Honda on the back of Pelagian hole sorting the diesel. It was mounted on a spring loaded obm mount that just got the prop out of the water when lifted. In moderate choppy waves it cavitated occasionally. Given its location (port side) it was not really easy to pull start or steer as pushpit and rear stays also lived there. Mounted on th rear transom a la Mk 1 may have worked better, but you have to ask why they gave up that design if it was functional and went for the well instead. I support Ian's comment about ensuring exhaust is vented out of the cockpit. Essential for comfort n to avoid headaches.

Rod

[Killick69]

Interesting discussion. How does one vent the exhaust out of the cockpit?
I have an 8 HP Mercury 2-stroke (mounted in the well) that I store in the cabin. At around 27 kg it is not too hard to move and this extends it life. The biggest issues with the 2-stroke are the fumes, followed by the noise. I wear ear muffs most times when motoring. I am planning on doing a major service on it soon and appreciate that the most arduous part of that will be lifting the motor into the dinghy. When the timber bracket that holds the outboard broke up some time ago, I went to great lengths to build a new one that drops the motor as low as possible and angles it optimally.Have not experienced cavitation and find Night Cap easy to manouvre with the outboard.

Suggestions on how to vent fumes much appreciated.


P.S. Diana, so glad to hear Sea lady is being repaired........rowed by last weekend and felt sad to see her sitting on the mooring showing damage.

[bearmcnally]

Hi Hatters

Why they removed the transom cut-out on the mk 2 and 3 was to modernize the boat . Stupid move ! Outboard wells are like a blowhole in some seas ,but if you like the smell of 2 stroke what's the problem ? Same reason the coachouse was changed to try and keep up with so called" modern changes in design ". Funny but you never hear Mk 1 owners complaining about their yachts

BEAR

[Troppo]

I don't get fumigated by my 2-stroke outboard. If the wind is blowing the exhaust back into the cockpit then it means the wind is some angle from behind you which means you don't need to use the motor, you can use a sail. Motor is for when the wind is directly on the bow and you can't sail forward. Joking.

I find I get very little exhaust in the cockpit. When motoring, the exhaust goes through the prop and I can see it bubble up with the prop wash out the back of the boat. It does not collect in the well when motoring. The very few times a bit blows back into the cockpit, I am usually standing and there is some breeze across the cabin that quickly blows it away.

I have noticed when going down into the cabin with the motor going that it can smell more of exhaust down there and the vibration and noise from the motor is worse.

As far as noise goes, I run my motor (18 hp) at half throttle or less and it doesn't seem that bad. I experimented with placing a large folded towel on top of the outboard cowling and it cut some of the noise. I may experiment further with some flexible sound proofing that I can simply roll right across the outboard well over the top of the motor. Just an experiment seeing as when I go down river I motor for 7 hrs each way.

troppo

[Iluka82]

I have an inboard in my tophat, however I had an outboard in a well in my bluebird, I used to suffer from the "blowhole effect" when I used it in port Phillip chop so I made up a foam pad out of an old sleeping mat to fit around the bottom of the outboard leg and fill the hole of the well. The foam pad was easy to fit when I fitted the motor and still allowed water to drain out, but stoped waves and reduced fumes from entering the cockpit.

[Ianb]

For the exhaust relief there is usually some small holes in the leg above the waterline. You connect these to a hose which ends just below the water.
I described a partial plug in viewtopic.php?f=3&t=1128

[SeaLady]

I am replacing my Mercury 8HP 2 stroke with a Tohatsu, 4 stroke 6HP.

It will fit in the well.
Under 30kg.
Comes standard with a high thrust sail prop and charging thingy.

SeaLady is nearly finished.