ventilation: Yanmar 1GM 6 hp internal diesel

[IzzyDeadyet]

Two questions for you.today.The first is a plea for sympathy and the second seeks advice

Q1) My Future Son in Law (FSiL) has seen an old 24foot (I think) sailing yacht he likes the look of and wants to buy I've been married 30 years and am still yachtless. Where's the justice in that? Cue sound of gnashing teeth.

Q2) FSIL's dream yacht has a Yanmar 1GM 6 hp internal diesel fitted between the end of the quarter berth and the cockpit. FSiL would like to somehow make use of the 'wasted' space above the engine and asks if the engine could be boxed in if plenty of ventilation louvres to allow air circulation were fitted, (would also reduce engine noise) Apparantly the he present owner said no, the engine should be left uncovered.

What do you think? Can he box in the engine if so how big a gap should he leave around the engine, is it ok to rely on ventilation slats/louvres/holes in the wood or is some other means of ventilation required?

I haven't seen the yacht so apologies if this question is even more inane than my usual inane queries.

 

[Evadne]

My 1GM is in the gap aft of the cabin and under the cockpit sole. There is lots of room for it and the various exhaust bits. It makes quite a racket so boxing it in with suitable insulation on the panels would probably be a good thing, although I've gone down the route of insulating the various panels as best I can, leaving the space unrestricted.
The main things I'd be looking at would be:
1) Air supply. It doesn't need much but it does need some. The equivalent of the air intake opening, unrestricted, (about 2" diameter,) should suffice.
2) Access. He will need to lift it off its bearers some time, as well as get at the engine, gearbox, coupling etc. for maintenance. He should take into consideration any other bits that are down there, such as tank valves, stern greaser etc. Don't make this any more difficult than it is already.
3) Heat shouldn't be a problem as that's what all the salt water sloshing around in the jacket is for, but they still get warm and I'd want to see of the order of 12" all round.

Hope this helps

 

[Burnham_Bob]

mine is in a 23ft halcyon at the end of the saloon, behind a moulding and then the gearboxgoes under the cockpit sole.

There's a shelf above it which leaves only a small clearance, so as long as the sewater gets at it it shouldn't overheat. Agree about the air intake, but as long as he can check the oil and do the servicing should be okay. However changing the anode and impellor are tricky jobs when you are in a tight space, and the gearbox dip stick is always difficult toget at in mine. Maybew if the boxing in is removable for servicing it might be better.

 

[Superflid]

Got the advice, just looking for the sympathy now! /forums/images/graemlins/wink.gif

 

[LadyInBed]

Re: Yanmar 1GM

Just a note:
The 1GM is 7.5 hp
(1GM10 is an uprated 1GM to give 10 hp)

 

[IzzyDeadyet]

Thanks Dave and you too, Barry.

That's exactly the advice he's looking for; I shall phone to tell him the good news.

And he will be very excited because he's getting a boat before marriage

Whereas poor me is still waiting 30 years after marriage.

Have I mentioned that before? /forums/images/graemlins/laugh.gif

 

[IzzyDeadyet]

[ QUOTE ]
Got the advice, just looking for the sympathy now! /forums/images/graemlins/wink.gif

[/ QUOTE ]

Yes, and I'm still waiting for the sympathy!! /forums/images/graemlins/smile.gif

Nobody cares.

Woe is me.

 

[corncob]

Ventilation is important, not just for combustion air, but for engine space cooling as well. Make sure that warm air can escape. You need an inlet and an exhaust point. Intake should be mounted low, exhaust high. Get hold of a Yanmar installation manual.