LB26

Power Boats only. Please include the boat type in your question.
jacquesmm
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Re: LB26

Post by jacquesmm »

Yes, M200 is not dense enough for lag bolts.

Option B is too tight.
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les2021
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Re: LB26

Post by les2021 »

Hi Jacques

Sorry if I am being a bit slow here.... are you saying go for option A. S/S angle ?

Thanks

Les

jacquesmm
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Re: LB26

Post by jacquesmm »

Yes.
The mount bolts are too close to the transmission. Are you certain of those dimensions? If yes, I would certainly go for the L bracket. Imagine how difficult it will be to reach the bottom of the oil pan in case you need it. I suppose you have an oil change pump but still, I like better access there.
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Fuzz
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Re: LB26

Post by Fuzz »

First I do not have your boats plans and second I have never seen one like it so this is just general boat comments.
I have owned a few diesel inboard boats and been around a ton of them. All the glass boats have had the engine sitting between the stringers. I would want to through bolt the stringers with angle iron to support the engine. I would never trust lag bolts over time. That is not too heavy of engine so the mounting angle does not need to be real heavy.

les2021
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Re: LB26

Post by les2021 »

Evening Guys

Well all was going well until today....
Glassed the hull inside, cut and first fitted the structural frames, removed them ready to to build the stringers and engine mounts.
Built a mock engine and then started to check engine angle and line etc so as to decide on stringer height.....
Then spent the next 4 hours checking every measurement from every angle and still can not work out what was wrong. Basically it looks like my shaft log is 100mm forward of what it should be. BUT I can not find the fault which is very frustrating all measurement, angles seem fine.

So the question I need advice on are as follows.

If the engine is 100mm forward will it affect balance.
The drawing shows about 200mm between the stuffing box and the coupling plate can I reduce this to 100mm. ( the supplier says that will not be a problem )

The thought of moving the shaft tube does not bear thinking about....

Cheers

Les
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les2021
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Re: LB26

Post by les2021 »

Sorry Jacques

That was asking you for advice.

Hope your trip is going well.

Les

fallguy1000
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Re: LB26

Post by fallguy1000 »

Fuzz wrote: Sat Mar 19, 2022 2:00 pm First I do not have your boats plans and second I have never seen one like it so this is just general boat comments.
I have owned a few diesel inboard boats and been around a ton of them. All the glass boats have had the engine sitting between the stringers. I would want to through bolt the stringers with angle iron to support the engine. I would never trust lag bolts over time. That is not too heavy of engine so the mounting angle does not need to be real heavy.
Certainly a lot easier than threaded inserts as long as you locate engine stringers to allow for the angles. The m200 might need some overbores for the angle connections. Were you thinking the angle is bolted to the side and so the engine stringers are wider than the engine mounts?
My boat build is here -------->

viewtopic.php?f=12&t=62495

fallguy1000
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Re: LB26

Post by fallguy1000 »

Jacques-you are needed on this thread for Les's questions.
My boat build is here -------->

viewtopic.php?f=12&t=62495

les2021
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Re: LB26

Post by les2021 »

Dan

This is the design I am now working to. I have measured the engine and made a mock up. Apart from the shaft log issue it all works well.

Cheers

Les

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Re: LB26

Post by les2021 »

Oops
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