space required for diesel

[Dave Williams]

Any of you folks have any input as to the space required for the installation of a little one cylinder 8-10 horse diesel. I bet someone here knows.

Thanks,
Dave

[NormMessinger]

I can send you a CAD drawing of the Yanmar GM-10 which I copied from the drawing in the manual if that will help. Yanmar also has that drawing on their web page.

In addition, as you know, you'll also need a fuel tank, battery, and exhaust component.

Let me know if you want me to drag out the books.

--Norm

[Dave Williams]

WOW Norm you're good! That would be excellent! I think I have room for tankage etc. but any thoughts along those lines would be appreciated.

The installation would be in a 30 ft. Swampscott dory which has been kicked around in Designs and Plans. (Searching for a particular dory design)

Thanks for being on top of this.

Dave

Thanks

[mmd]

This is a topic that I have many discussions about with owners and builders. I won't get into the great long details; suffice it to say that when you plan your installation allow adequate space around the engine for air circulation so the engine doesn't run hot, and allow for adequate air intake and exhaust vents to both feed the engine with combustion air and cool/exhaust air in the compartment.

I have seen several installations where the owner tells me that the engine runs fine as long as the engine hatch is open! :rolleyes:

[Dave Fleming]

MMD, we built one 98 foot Aluminum motor yacht whose owner demanded extra ventilation for the engine room. Engineer obliged him but, when venting was on the access could not be opened the suction was that strong! Engines of course had their own intake access. Big Cummins, IIRC.
Needless to say modifications were in order. ;)

[Jack Heinlen]

Nah, keeps the engineering "staff" where they belong, below. :D

[mmd]

Funny (albiet expensive) story, Dave. I designed an aluminium commercial lobster fishing boat w/ 3208 Cat and a jet drive that, by necessity, had a rather large engine box on deck. To keep the engine from getting wet and the box as small as possible I opted for no vent louvres in the box except for a shielded exhaust vent at the upper aft end. Air intake was via ducted intakes located up under the gunwales and leading 'thwartships to beneath the front of the engine. I gave two options to the client - large natural intake or small intakes w/engine-driven centrifugal intake fan. The builder convinced the client that the small intakes w/o the fan was "more than enough". When completed, the engine at full speed would create enough vacuum in the engine box that you could see the sides of the box flex inwards! They said it ran fine if they propped opened the engine box with a scrap 2x4. Sheesh!

[ 10-20-2002, 12:57 PM: Message edited by: mmd ]

[NormMessinger]

Um, DaveW, what would be good? The CAD drawings? What format can you use? I use TurboCAD but it will save in a variety of formats. DWG?

Or good, the URL I did not provide? http://www.yanmar.com/marine/pdfs/123%20GM%20INBOARD.pdf

I may still have some pictures of the GM-10 installation in Prairie Islander it they would help.

--Norm

[ion barnes]

Hey Dave, find a copy of THE NATURE OF BOATS by Dave Gerr. Its a great book for "boat design 101" and comes with a number of rules of thumb that you may find useful.

[brian.cunningham]

Make sure you can get at all maintainance items.
Finding out that you can't remove a filter would not be good :eek:

If you have the room to take it apart in place, remove the head, that would be nice.

Being able to remove it entirely w/o taking the boat apart would be nice too.