New to SIBing and after some guidance

[Wazzajnr]

By the way, if you don't want to run to the price of the bravo, I have one of these from force 4 chandlery and highly recommend it.
Got a built in battery so you can take it with you and top up the tubes once you've been on the water for a while.

https://www.force4.co.uk/item/Force-...-Inflator/29WA

[Fenlander]

>>>New to me evinrude 9.9 is fitted with a 9.25x8... guessing I'll probably have to up the pitch for better top speed.

If you think that will be an advantage then an easy all round solution... get yourself a 9" pitch and sell John your 8" pitch.

[Wazzajnr]

If I get a 9" and it works fine he can have the 8" foc

[John McOmie]

I've had a bit of time and got the SIB inflated in my garden to see if the engine is sitting too high or low...I felt it was low in the water. I've taken some photos with a garden cane as an indication of the bottom of the boat. Anything look different to how it should?
The photos go from hole 5 further away to three to number one and finally zero holes.

[Fenlander]

The outboard's height looks near enough to correct not to be an isue.

But unless it's an optical illusion even the last image with the outboard on zero holes out it is still not close enough to the transom and will give bow lift.

I'd look into what is holding the ouboard out.

Also take off the foil for testing.

Finally I'm certain that is the wrong prop for a SIB... looks like a high thrust type for a larger heavy river or sailing boat. I reckon that outboard should have a three blade with a rather more fine blade design.

BTW I reckon that Evinrude is 1990s not 1980s. Somewhere in the range 1993-2003.

[Fenlander]

This is more the type of prop you should have...

https://www.amazon.co.uk/9-25-Alum-b.../dp/B00FI0A0M0

[John McOmie]

Thanks Fenlander, your knowledge is amazing! How will I know that's definitely the correct prop?

[John McOmie]

This is the only badge ID I can see on the motor and when I searched I couldn't locate anything that made sense to me!

[TmMorris]

It definitely looks like the previous owner nicked a prop off a tugboat!!

[Fenlander]

If you search Evinrude year by serial number you could work out the age... I can't easily read the last character to check it.

It does seem the Evinrude/Johnson motors took the same prop fitment over many years but just pop your old prop off and count the spline numbers to be sure... this is normally given in any prop listing.

As you are starting out with a non-suitable specialist prop you don't have a base line to work from in choosing any replacement even if you had a small rev/tach counter. I would say a 9.25 x 9" pitch may be OK in a standard 3-blade but a safer bet is to go for the 9.25 x 8" pitch as that is more likely to get you on the plane.

I've looked for aftermarket ones nearer £50 and not found anything that says it suits the 2-strokes... but it may be ones listed for the 4-stroke would fit but check with any supplier.

These folks have great experience and could advise...

https://www.steeldevelopments.net/

Re the ventilation plate foil these are only fitted to reduce a setup issue where things aren't working properly and are a bit of a sticking plaster over a more basic issue. So never start out with one fitted as your setup may be fine without once the trim angle and prop are sorted. They add drag and can cause odd steering problems.

Re the outboard trim angle you could try and get an image of the area where the trim pin goes for us to see why the outboard leg isn't closing closer to the saddle and therefore the transom.

[John McOmie]

Hi, I've taken photos as below. Hope this helps answer, two from RHS and one LHS.
I've removed the prop and it has 13 spines I think you might be correct that the previous owner added the foil to correct an issue and made it worse so he sold it on. I can't complain as I got the Zodiac 310 cadet and engine for £400!
After doing more research it looks like this Evinrude commercial was made for South America, 10hp, and is a commercial with program tilt, circa 1994.
So to replace the prop I guess that I should go for a 9.25 x 8 without the foil on. I'll contact the steel devolopments folks and see what they advise.

[Fenlander]

Originally Posted by TmMorris

It definitely looks like the previous owner nicked a prop off a tugboat!!

Indeed, knowing that prop type probably as capable of getting on the plane in reverse.

[Wazzajnr]

Looks to me like the shallow water bracket is in the wrong position. It's the sort of square flat metal plate.
For the record, I was on plane this weekend with two adults totaling 190kg and two kids at about 35kg each in a 3.2 sib with an evinrude 9.9.
One more kid at about 30kg meant we couldn't plane.
Both us big lads had to shift well forwards to get over the hump but once on plane we could sit back on the rear bench.
When I chuck mine in the tank for a proper flush tomorrow, I'll try and get a video of the shallow water mechanism so you can compare it with yours.

[John McOmie]

Excellent thanks!

[Fenlander]

Looking at the saddle/tilt area I wonder if a spring has broken or pivot/linkage seized such that something that should be in a home position of sorts is sticking out preventing the outboard leg going fully home? Even the main pivot it tilts on might be over tight or seizing so it sticks before going fully home?

Edit: Just seen Wazza's comments... we are thinking along similar lines and a picture of his would be a great help.

[Fenlander]

Oh yes be super careful the leg is supported if you have your fingers anywhere in the tilt/saddle area... if you unexpectedly cause it to drop by accidentally tripping the tilt release lever fingers are at risk.

[Wazzajnr]

Yeah, it's a bit of an odd mechanism. Mine has a lever that allows you to lock the tilt for reversing but when it's unlocked and you tilt it part way the little latch springs down and allows the prop and half the cav plate to sit in the water.
When I reved mine in that position, I got a nice rooster tail and precious little forward motion but idling will move you slowly out of the shallow water.
With the boat fully loaded I can get to about mid calf depth before the skeg touches.
I'll do a vid tomorrow but it will be late afternoon/evening before I get the motor in the tank.

[Wazzajnr]

Hi John,

Have a look at this video. Pretty sure the shallow water mode is being left on or is stuck in shallow mode.
Should be a bit clearer from the video but any questions, please let me know.

https://youtu.be/hEram5LkwX8

Cheers

[Fenlander]

Top video Wazza... I reckon you've ID'd the problem.

Assuming so with that operating or set correctly, a proper 3-blade prop and the foil removed that outfit of John's will perform so much better.

[John McOmie]

Thanks for that video Wazza, I'm working until 9 tonight but will try and get outside if it's not raining and have a look, that would certainly make sense as to why it's sitting at an odd angle!! You guys are amazing, cheers!