| Author |
Message |
James Robinson (Jjrbus) (209.26.169.76)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, April 28, 2001 - 4:05 pm: | |
Just bought 8kw onan marine diesel genset, can I use on bus? Thanks in advance. Work safely Jim Robinson |
jmaxwell (66.42.93.134)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, April 28, 2001 - 4:19 pm: | |
I know of a 12kw Kohler marine set in a Prevo Champion, front compartment, completely insulated box with baffled air traps in and out, exhausted to the engine exhaust and tapped into the engine radiator for cooling. U can stand beside the front compartment and only pick up a 20db "humhh" |
Tony Wahl (64.12.101.167)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, April 28, 2001 - 9:58 pm: | |
Hi Jim,
As rule of thumb, marine units are generally superior to their beach bound brethren in construction and the use of non-corrosive materials where practical. As long as it dosn't have a sea water heatexchanger for cooling you should be ok. Onan is popular make and parts are readily availible.
We've got a 6kw Yanmar and believe you me,its some louder than 20db! But we got 'er boxed&baffled to a tolerable level.
Good luck with your generator,
TonyW |
Steve Fessenden (63.25.125.126)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, April 28, 2001 - 11:43 pm: | |
You probably have a water cooled exhaust manifold which will reduce heat in your generator compartment. Costs extra.
Steve Fessenden |
Henry vdG (63.28.225.218)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, April 29, 2001 - 12:11 pm: | |
Mr. Maxwell, I (for one) would like to know more about your soundproofing tips (in/out baffeled air traps in particular).
Thanks for sharing. |
jmaxwell (66.42.92.112)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, April 29, 2001 - 1:58 pm: | |
This is in a friend's bus. Gen set is enclosed in a sheet metal enclosure that is lined with high density fiberglass and pyroshield(can't recall the brand name but is a relatively new heat shielding product that is 1/8" white fibrous material that looks much like the old asbestos blanket material--it is rated at 3000 degrees;abt. $2.50 sq.ft.) The air baffles are very similar in idea and design to a sewer line p-trap, fabbed from flxble air duct used in houses, 12",with 2 louvered air grilles placed opposing each other at the case, in and out. Uses a fractional hp squirrel cage fan,mounted at the discharge side of the enclosure,to move the air. The unit is mounted on some huge 2" live rubber blocks(don't know where he got them). The air ducts take up some space, but certainly stop the flow of noise. I have heard of the air trap design on other buses but this is the only one that I have actually seen. |
Bill Gerrie (24.112.158.230)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, May 02, 2001 - 11:36 pm: | |
James
I bought an Onan 7.5kw marine diesel cheap and rebuilt it for my coach. It had the water cooled exhaust manifold which I used as well as wraping the exhaust pipeing with a heat retaining material to help keep the compartment cooler. I moved the electronic circut board to the inside of the coach to keep it from the heat. I did away with the seawater heat exchanger and built a small tank with a rad cap on it. This was necessary to always have a supply of water above the water pump or else the water gets an air lock and does not circulate. The rad I used was the under floor heater from a New Flyer bus which I mounted up front under the coach. I use one 12v electric fan from a Mustang and another one beside it to come on if the heat rose to high. This setup works great. I even put in a temp. gauge and an oil pressure gauge on the dash to monitor things. One last thing I did was to use a 30 second timer to allow the glow plugs time to heat before the unit tried to start. This way I can hold the start switch on the remote unit inside the coach instead of having to go to the generator to preheat it and when the time is up it starts. Hope this helps you. Bill |
James Robinson (Jjrbus) (209.26.169.109)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, May 03, 2001 - 12:17 am: | |
Thanks for the responses, I got mine cheap also $500 it runs but does not generate power.
I've been thinking of putting the genset in the bay where the air conditioning and heater core were on my MCI5c The lines for the heater are still there, why can't I just hook the genset up to them and use the bus cooling system?
I thought this thread would catch FFreds attention he must still be in transit.
Work Safely Jim Robinson |
Bill Gerrie (24.112.158.230)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, May 03, 2001 - 10:20 am: | |
Jim
I guess Fred is in transit. He usually responds quickly. Mine also didn't work but I was able to get all the books and get it going. Parts for these sure are not cheap. Before you invest too much time do continuity checks on the fields and the exciter windings. These are the real expensive parts. Almost to the point of scraping the whole unit. If these and the diodes are okay the trouble is probably the circut board. This is about $200 CDN. Good luck. Bill |
FAST FRED (63.208.81.188)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, May 04, 2001 - 6:58 am: | |
Usually the old marine stuff is a hard road.
Living in a wet to very wet bilge , somtimes coming in contact with sea water, and "out of sight ,out of mind" gives marine gensets a HARD life.
Never purchase a unit that did not have fresh water cooling , the sea water only stuff is thermostated to under 140 deg F{ so the salt doesn't precipitate out of the sea water blocking the cooling passages}.
The low operating temp reduces the service life almost as much as underloading does.
With an extra boost pump , you might get a marine unit to cool thru the coach radiatior , but if the set is needed for road air cond , this might not be a great system.
I would use a seperate cooling system for the gen set , running it thru a hot water heater , and perhaps valved baseboard radiators , to co-generate heat if needed.
FAST FRED |
James Robinson (Jjrbus) (209.26.169.194)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, May 04, 2001 - 7:29 pm: | |
Thanks Fred, I picked up a couple of good buys at the Marine flea mkt. thanks for that also. |