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Post by boaraxa on Oct 6, 2009 20:52:21 GMT 12
Hi guys i was wondering if anyone could tell me weather you have to run a new dredge in or are they good to go?
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Post by RKC on Oct 7, 2009 12:42:10 GMT 12
G'day Boaraxa,
If you have brand new motors on your dredge its worth running them in before you put the dredge in the water. The engine manufactures commonly state that their motors are already run in before being sold but I still think its worth runing them in. There has been some infomation on running in motors I previously posted on the forum but I'm unable to find it. I will keep looking.
Regards,
Rob (RKC)
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Post by goldkiwi on Oct 8, 2009 21:25:52 GMT 12
To run in a dredge motor is like any motor, requires some load and to get some heat into the motor so best for a dredge is set up somewhere to dredge, start the motor(s) pumping water thru the dredge with motors at quarter throttle for 15 minutes to allow heat to sink thru the motor, up to half throttle for half hour, idle a few minutes, and shut off. Let the motor cool for half hour, start, run at half throttle for 10 minutes to let heat sink in and go for it. Just remember when dredging let the motor get heat in before full throttle and after running full tit to idle the motor a few minutes before shutting off.
I used B&S motors for one season and thru them away then went to good old Hondas which lasted for 2 seasons full stick. They would do 1500 hours and I would toss them. That worked out at less than 40 cents and hour. Waste of time and money reconditioning them as was easier and cheaper to buy a new motor. The Hondas would break the rockers and the valves gave in after this. Sticking valves was another problem so on the odd occasion upper cylinder lube was put in the fuel. Other than that the Honda was the best of all the motors available and at a good price. Robin, Kohler, Yamaha, B&S were all tried but none matched the Honda for longevity with a P350 attached at full noise.
Trust this helps.
Ray
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Post by GeoffS on Oct 9, 2009 19:53:59 GMT 12
Phil
Ray`s advice is all good but I would add that you should drain the sump oil after one hours running and replace with new oil according to the specs in the Honda instruction book. For your interest inspect the old oil and you will be surprised at the metal filings you see in it.
Our engineer recommends doing this 4 or 5 times -I don`t know- I am not an engineer but do read the manual thoroughly.
Geoff
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Post by boaraxa on Oct 9, 2009 23:31:32 GMT 12
thanks for the advice guys.
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Post by RKC on Oct 10, 2009 14:55:54 GMT 12
G'day, A mention of using synthetic oil in dredge engines is worth making in this thread ... The information below is from my post in the thread "DREDGING TIPS" at golddredgingforum.proboards.com/index.cgi?board=articalsofinterest&action=display&thread=26SYNTHETIC OIL IN DREDGE ENGINES.
Professional dredgers often prefer to use a fully synthetic oil, such as Mobil 1, in their dredge engines as synthetic oil will reduce friction in an engine cylinder. Dredge engines can then be run at a reduced revs, which will lengthen engine life.
A new engine will contain a petroleum based oil of the manufactures recommended viscosity and will need to be replaced. However, before replacing the petroleum based oil with a synthetic oil, its important to first run-in the engine. The run-in period can be for up to 10 hours and during the run-in period its preferable 'not' to have a load on the motor and to run the motor at minimum revs.Regards, Rob (RKC) |
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Post by RKC on Oct 10, 2009 15:04:48 GMT 12
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Post by lipca on Nov 18, 2009 15:15:24 GMT 12
I might add that while you are breaking in that new engine, make sure you have water running into your pump so you don't ruin the seals.
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