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post #1 of 7 Old 05-24-2019 Thread Starter
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Perkins diesel questions

I have always had Yanmar's in the boats with inboards - anything particular I need to look out for in a Perkins? It is freshwater cooled ( heat exchanger). Supposedly in the last 5 years it has been removed and overhauled ( whatever that means - different things to different people) . The engine is very clean - starts right up - no blue or black smoke - easily shifts into F or R. Not sure on the hours - its the original engine of a 1985 boat -
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post #2 of 7 Old 05-24-2019
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Re: Perkins diesel questions

They are British ! Parts at North Atlantic Diesel, if in U.S. Good motors !
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post #3 of 7 Old 05-25-2019
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Re: Perkins diesel questions

If you have always had Yanmars, you've probably had gear drive trannys, whereas the Perkins is usually paired with a Borg-Warner Velvet drive tranny. Completely different beasts. Always check the fluid in your BW before operating the engine. It is supposed to be checked when warm, but that's so inconvenient that most just do it cold and note that the fluid level remains the same. The biggest difference between the two trannies is that the BW is hydraulic and will not stop the prop from rotating while sailing. Though BW now maintains that the spinning under 10 knots or so isn't a problem, it is noisy and personally, I don't feel comfortable about letting it spin for long periods or speeds above 6 knots. Therefore, I'm more comfortable with a shaft brake or a feathering prop on a BW tranny.
Also, if possible, note the reduction ratio on the tag before it gets painted or worn away.
Perkins puts an absolutely ridiculous multi-piece secondary fuel filter on the engine, however, there is a spin on filter kit that is worth every penny. Also, if the oil filter is not in a convenient place, definitely purchase and install a remote kit to facilitate oil changes. These are much more lightly built engines than the Yanmars and frequent maintenance will help them last longer with fewer problems. Make sure you do not let the engine overheat! They aren't very forgiving about that.
These engines have been around a long time and you should be able to get parts almost anywhere in the world, but TAD is definitely a good supplier.

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Last edited by capta; 05-25-2019 at 05:24 PM.
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post #4 of 7 Old 05-30-2019
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Re: Perkins diesel questions

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Originally Posted by mike dryver View Post
They are British ! Parts at North Atlantic Diesel, if in U.S. Good motors !
TAD or Trans Atlantic Diesel in North Carolina.
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Re: Perkins diesel questions

my cal 39 has a perkins that is a good runner ...capta: u said they dont like overheating...my 4108 runs about 180-185 is that about right?
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post #6 of 7 Old 05-30-2019
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You want the thermo to control the running temp....
What temp is specd for your engine
Thermos come in differrnt varieties
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post #7 of 7 Old 05-31-2019
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Re: Perkins diesel questions

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Originally Posted by Cal39Tantrum View Post
my cal 39 has a perkins that is a good runner ...capta: u said they dont like overheating...my 4108 runs about 180-185 is that about right?
I was speaking of 200+ degrees as overheating and happening suddenly. Diesels generally run around 180, but remember the gauges are not exact, so your 185 may actually be 178.

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Last edited by capta; 05-31-2019 at 04:51 PM.
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