New Suzuki 150 challenges

[Xk59D]

Originally Posted by jwalker

I give up. The arithmetic is in front of you.

'there's none so blind as those who will not see'

He hasn't said how he measured the transom! Yes it matters, you can't just measure along the angle.

I guess the rib maker can't add up either as they mounted the A frame low enough it hits the engine, idiots. Want to have a charity bet a long shaft wouldn't hit?

talk about blind, bit ironic surely as you clearly can't see what the pictures show, old engine was a long shaft, if that new engine was any higher it would need wings and a PPL to use it.

[neil.mccrirrick]

Here is some advice re rigging. Hope it helps in deciding to stay as you are or not https://www.boats.com/how-to/the-out...t-adjustments/

[Pikey Dave]

Originally Posted by neil.mccrirrick

Here is some advice re rigging. Hope it helps in deciding to stay as you are or not https://www.boats.com/how-to/the-out...t-adjustments/

Good article Neil & answers my query, now where's my popcorn??

[brucehawsker]

Well I am glad to be fuelling a worthwhile debate! My measurements were with the rule flat up against the backward sloping transom.

[Pikey Dave]

Originally Posted by brucehawsker

Well I am glad to be fuelling a worthwhile debate! My measurements were with the rule flat up against the backward sloping transom.

Oooh! You sure know how to fuel a debate Bruce[emoji23]

[brucehawsker]

Trimmed in:
3000 revs 17.5 knots
4000 revs 27.6 knots
5000 revs 34.7 knots
5700 revs 35.8 knots

Trimmed out optimally

6000 revs 40.9 knots

2 big blokes. 55 litres of petrol left. Six pod seats. Small Solent chop. All two way averages over short course.

About 2.5 knots down on the Optimax where I got 43+. Of course she was fully run in.

It's only numbers, I know, but she also looks messy with loads of spray!

[Xk59D]

I assume you are intending to keep this engine then as you are still using it?

In which case will you be content if the splashing is gone?

You really need to go up with the engine though but you are probably stuck with trying another prop or drop the engine lower.

[brucehawsker]

Slower speed photos

[brucehawsker]

Faster photos

[brucehawsker]

The supplier wants me to run it to 20 hours service. He is convinced the problem is tweakable. I am witholding payment.....

[beamishken]

Originally Posted by brucehawsker

The supplier wants me to run it to 20 hours service. He is convinced the problem is tweakable. I am witholding payment.....

The problem is tweekable however it requires alterations to the boat to enable the engine to move up the transom.
Withholding payment puts the aces firmly in your hands

If the engine can be moved up to a satisfactory height then i think the xl engine is probably good for your boat as your previous opti did seem to sit deep in the water at rest

Its how the alterations are achived that will be the deciding factor If they can be done at all

[brucehawsker]

Fastest Photos

[brucehawsker]

Thank you all. Would love further input on whether to reject engine or how to guide the builder in the necessary modifications.

Do the photos and the speed / revs stats give us any clues or more / less cause for concern?

[Xk59D]

If this was my boat and I wanted an xl I would be getting a new transom or it filled in professionally if possible. the engine needs to go up still and it is asking for saddle problems down road you would think.

I would be putting a long shaft on if you were happy with old engine performance but I do agree the powerhead is low so the juice may be worth the squeeze to mod the boat for it....your call. The boat builder I assume designed it that way rather than someone breaking out a grinder and lowering the transom, possible ofcourse.

[charliee]

I guess they need to build up the transom so that the engine can be mounted higher up. More of the engine will crash into the transom.
I would be examining to see if the long shaft would work better with the boat and a frame as it is.
Without seeing the boat it’s hard to be sure but for my money a long shaft would be much more suitable.

[jambo]

Here’s my wake from recent trip two up half tank 28mph at 3700 rpm. Hope it helps RC 585 Merc 150.

[Last Tango]

The boat didn't need modified to suit the Opti. I wouldn't buy a second hand boat that had had the transom "built up" to compensate for a mismatched engine.
It looks "wrong" and this will make it a pain to try and sell when the time comes.

If they wanted 13k of my money I'd want the job done properly...ie the right engine fitted or I'd be looking for a huge discount because of the devaluation of my boat.

If there is mechanical scope to drop that engine 4" then it needs a long shaft.

[Xk59D]

If it helps...I still think mines could go up but I'm happy here. XL Suzuki 200 on ribcraft 6.8.

[Iron Dials]

Steady on!
I wouldn't be considering modifying my boat to fix the engine supplier's problem.
I also wouldn't keep using it, it can be perceived as acceptance.

[Searider]

Call Lee Fairweather at Fairweather Marine. He built the boat and will be able to confirm transom height.
Get this in writing before going back to your engine supplier.