Little skiff

Any questions? We will try and help.
screwit
Posts: 930
Joined: 09 Apr 2010, 21:29
Location: Stratford vic

Re: Little skiff

Postby screwit » 16 Jun 2017, 07:06

Darren I wanted to lengthen the plaining surface without having a step in it witch a flat board would have had with the reverse plank .
Flat board would have been easer !

screwit
Posts: 930
Joined: 09 Apr 2010, 21:29
Location: Stratford vic

Re: Little skiff

Postby screwit » 07 Oct 2017, 19:53

A quick tip.
When wetting out the boat dont foget the hose is running.
Had water seeping out the steering cable holes .
I also found a leak l didn't know about in the eng.
Found 2 " of extra oil on dip stick !!!!
Buggerrrrrrŕrr.

Reklaw
Posts: 157
Joined: 17 Nov 2014, 14:35

Re: Little skiff

Postby Reklaw » 08 Oct 2017, 10:40

Glad that the hull held together with all that water in it. Have seen boats pop the transom when they're full of water and someone pulls them out on the trailer without draining them first,

screwit
Posts: 930
Joined: 09 Apr 2010, 21:29
Location: Stratford vic

Re: Little skiff

Postby screwit » 10 Oct 2017, 20:31

To day I ran the engine with fresh oil and filter. All good now .
Added some nylock nuts to the cavplate bolts .
I intended to give it a run but wind came up , so i took 1/4 " of the tip of thr prop.
Its now 10 1/4 and installed it .
I teresting to see what happens .

screwit
Posts: 930
Joined: 09 Apr 2010, 21:29
Location: Stratford vic

Re: Little skiff

Postby screwit » 24 Oct 2017, 19:08

Yesterday we took to the lake and did some testing.
After ajusting the cav plate down on the outer sides as the centre is still fixed to tbe extended keel, finally got it to ride nice.
Envine revs to 5500 but l tbink the ww 2 bl carb iz at its limit ..

screwit
Posts: 930
Joined: 09 Apr 2010, 21:29
Location: Stratford vic

Re: Little skiff

Postby screwit » 28 Dec 2017, 19:15

Have now got the engine out and flipped it over on the engine stand and removed the sump.
Have started to make a full windage tray to cover the rotating components.
This isn't easy as there is very limited room between the sump as the conrods.
The intention is to keep the oil out of the crank.
And while im at it will look at the oil return and baffling.
Im all so looking at a breather tube in the side of the sump that will help vent the bottom half of the engine and take draft from the push rod holes letting the oil flow unrestricted by the breathing.
That's my thinking anyway .

Will
Posts: 53
Joined: 21 Nov 2015, 14:04

Re: Little skiff

Postby Will » 01 Jan 2018, 20:05

I like your thinking - most engine builders don't think much about returning the oil to the sump as efficiently as possible
The crank and rods flailing in oil consumes power and creates excessive heat in the oil.
A well thought out windage tray with crank and rod scrapers set very close to the rotating bits do a great job
I also like your ideas on the push rod /cam follower area - any return oil your can keep out of the crankcase 'cyclone zone' the better
The good part is there is no down side to these types of mods -some are tiny incremental improvements that you probably cant see / measure - others will give obvious improvement in oil temp and performance.
The test is NO or very little oil in the breather/ catch tank and lower oil temp in identical conditions (Oh scare yourself and put a temp sensor in the sump!)

screwit
Posts: 930
Joined: 09 Apr 2010, 21:29
Location: Stratford vic

Re: Little skiff

Postby screwit » 03 Jan 2018, 23:00

Today l have fitted the windage tay permanently.
Have got the sup fitting with some small clearance ajustments with out the gasket , and also fitting a breather on the side of the sump above the oil level that l can extend higher with a tube after the eng is refitted.
Not much to spare in there !!!
Will -
I hope to see something for all this work .
It would be easy to dry sump if l have too .

Will
Posts: 53
Joined: 21 Nov 2015, 14:04

Re: Little skiff

Postby Will » 04 Jan 2018, 10:24

yes sometimes you wonder how much trouble to go to?
Ive always liked the confidence a dry sump provides and tho Ive never done a boat motor they seem a logical choice with the weird angles they run at!
However the return oil management doesnt change much its still a challenge to get 'right'
Seems like you are on top of it good luck

screwit
Posts: 930
Joined: 09 Apr 2010, 21:29
Location: Stratford vic

Re: Little skiff

Postby screwit » 04 Jan 2018, 21:17

To day was a busy day taking Screwit for a run in the morning and bolting on the sump of the skiff and rotating it up the right way to install the pipe cleaners in the pushrods tomorrow . I still need to find some tube to extend the sump breather and make a support and be able to push on a vented cap .


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