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The new diesels are computer controlled every thing now , They are very efficient, Some mechanical pump diesels have variable timing, Bosh has been building variable pumps for a wile, they are found mostly on higher RPM Diesels, One of the big plus points on variable fuel timing is the rotating...

On engines that have external levers on the fuel pump I think a energize to stop is best, just one less electrical load during start up, then back it up with a simple pull cable and your bullet proof, Yanmar stop cables are cheep and real flexible its a easy install. On some engines like the B...

The Yanmar 4 JH series engine is a very efficient Diesel, Its high compression and has very high fuel injection pressures compared to a 120 ford, The JH Yanmars were some of the first to comply to the European air standards for Diesels, I have sold , repaired and rebuilt many JHs and they are a...

Nigel is a very sharp guy but... What is considered a large engine? A ford 120 driving a 3.5KW can run a 1 to 1 ratio , it will draw less then 10 HP off the 120, it will self govern from the ford, It would cost very little wile cruising, not much more than a high output DC alt, The fuel cost...

Many small volvo gears use a sliding cone and shoe set up not multi wet disc, Check for fluid compatibility.

Why not fab up some brackets and belt drive it off the main engine, very popular in Europe, you can spin it all the time or magnetic clutch, you will nead a hertz meter for the proper rpm. Craig

I agree 10x.... Be very aware what chemicels you dump in oil and fuel, there is more snake oil than snakes in todays market.

Food for thought, Lets look @ a lehman 120, vs a Kohler 8KW gen , both very popular on trawlers The ford holds 3 gals of oil, has a sea water oil cooler is 16 to 1 compression and is very often run @ 1800 RPM. The kohler holds 4.5 qts of oil has no oil cooler and is 24 to 1 compression and runs...

Look out... I have another rule :dance: There are lots of products you can purchase to dump into fuel or oil... The real ones will have a Mill Spec # or a OEM endorsement or recommendation... That means its been tested and approved for fleet use by a third party lab. As for the rest of the stuff...

Some more thoughts on pre lubing & dry starts, To start.... ALL engines are different, some engines bleed down oil very slow wile some fast, In the last 35 years I have rebuild over 200 diesel engines and a few propane and gas, We test run every single one in the shop before we install, Every...

Nice math fella :thumb: But incomplete, you have to apply the compression pluses vs the weight of the column of water plus the lift height to see if the water will pulse drain :popcorn:

Eric I think most small automotive type oil filters hold between 15 to 30 grams of trash, The only way to see the % of filter left would be to cut it open and weigh the filter media vs a new filter media that was wet with the same amount oil or just change the filter when you change your oil.

Thanks for the heads up :thumb: As stated in the previous sentence< We use the 3 / 20 second rule > For pre lube I would only crank once for 20 seconds. In the next sentence I stated that it was a good idea to know the height of the exhaust hose in the boat, We always install the exhaust run so...

That's a very good point on boats where the engine is close or below the water line < deep draft>, the water has to lift up to get out of the boat , At that point you would need to close the engine sea water valve to crank the engine, We use the rule never crank more than 3 / 20 second cranks...

To start I think that argumentative and critical are good things in these posts, they only lead to more info :thumb: There is so much data on cold starts I wont go there now but remember boats are not cars and the length of time between starts if a major factor, Pre lubing on the starter motor...

Eric, The oil filter by pass valve operates on a pressure differential or drop thru the filter, When the filter is clogged or the oil viscosity is high the valve opens allowing un filtered oil thru the engine, It is the lesser of too evils, dirty oil is better than no oil, oil filter capacity...

Some tricks for diesel boat owners, Cold starts are hard on engines that sit between start ups, Most engine ware comes from the lack of lubrication on bearings and cylinder thrust surfaces on cold starts, The cold oil viscosity will open the oil filter by pass valve allowing un filtered oil...

Sounds like a fuel injector on its way out to me, If its a Kolher 8kw it may be a 3GM yanmar painted white, the fuel sol will start to kill the engine or loose rpm if its clicking or dropping out, If its in the valve train it will sound slower than engine speed or 1/2 speed, if you are seeing...

I rebuilt the diesels in my 1971 ford 2000 diesel tractor some 15 years ago and the diesel in my ford 3000 4x4 diesel tractor shortly after, they both had over 10k on the clocks and ran fine, they only used dino oil and were way out of spec on the rod bearings to the point the crank pins were...

On older Diesels that black out the oil fast, the carbon and soot can put the oil filter into by pass, especially when the engine oil is cold, the black oil is abrasive, oil filters are cheep insurance with the exception of Fram oil filters, they tend to blow the cardboard end caps and allow...

Oil filters are cheep but if you need 25hr change outs you may consider a leak down test or save the money for rings, liners and injector tips. The one bad thing about old design Diesels is you never know when a oil filter goes into bypass, Carbon has very much a snow ball effect, It starts off...

My take on the Dino vs synth is... It can be discussed for ever cause there are way too many variables in engine design , year , model, load , rpm , usage, condition etc from all the different posters who offer a contribution to this issue, You cant compare a newer common rail electronic fuel...

Oopps, I forgot one :banghead:... engine room free air, very important on turbo Diesels

Good question Tom.... Providing you get all the oil oil out when servicing and the service is done at the proper times, even diesel oil should stay clean, When oil overheats it will darken and have a burnt smell , Most engine ware surfaces like bearings, piston skirts, rings , cylinder hone...

Sorry don't have any cut oil filter pics on hand just foul diesel fuel tanks, the link provided after my post should help some, Wix is a good Co. All there filters have metal inner caps not cardboard like many very popular brands, My point on the oil filter thing was to shed some light on how...