Gilbert Park installs a temperature monitor and alarm to prevent costly exhaust hose damage in the event of impeller failure
engines
Marine alternator troubleshooting
Ali Wood gets to grips with Maximus’s faulty electrical system after some unexpected failures made an appearance on passage
Refurbishing a boat alternator
James Wood removes Maximus’s alternator and gets it repaired
Loss of engine power under load: expert advice to solve the problem
Anne Cees Houtman has a problem with a loss of engine power under load. PBO's engine whisperer, Stu Davies thinks he has the answer
Petrol or diesel, inboard or outboard: which boat engine is best?
When it comes to a boat engine, which is best? Petrol or diesel, inboard or outboard? Stu Davies answers your questions
I need help understanding my marine alternator! Ask the experts
PBO reader Paul Farr wants help in understanding his marine alternator. Engine whisperer Stu Davies comes to his aid
Cleaning a diesel tank: a practical guide
Richard Barnard braves the mess and overcomes key challenges for the satisfaction of a clean fuel tank, free from sediment and sludge
Why does boat engine oil need changing? What if we didn’t change it?
Why do we change our boat engine oil? A seemingly innocuous question I was asked a few months ago. Because we do? Because it’s dirty? Because the handbook says so?…
Replace or rebuild? How to tell if your old boat engine is salvageable
Most of us will know someone – and may have been that someone ourselves – with a rusty, rattly, oily or smoking marine diesel engine. The sort of old boat…
What’s the best boat fuel? Is it worth paying for premium? Ask the experts
PBO reader Roy Gwilliam asks: “I have a Yanmar 3YM20 engine in my Dehler 32, built in 2010. I generally use red diesel with the belief that it does not…
Dispose or polish? What to do with old diesel – Ask the experts
PBO reader Martyn Crossland asks: “I have a 1989 Beneteau Oceanis 320 that I bought in Greece in 2009. I spent two months restoring her, and then had two months…
Warning: E10 petrol and older boat engines don’t mix
Fears are that older boat petrol engines – both outboard and inboard – filled with E10 could be caught out in a dangerous situation.
Common rail diesel engines explained: Should I install one on my boat?
Common rail diesel engines have been used in boats and trains since the 1940s, and were given more development for road vehicles in the late 1960s. However, not many smaller…
Cloudy diesel: What is making my fuel turn more orange than usual?
The red diesel in the bowl of my primary filter looks cloudy and has a more orange colour than normal. There is no sign of water in the bowl. I…
The step by step guide to dismantling a PRM 100 marine gearbox
As a boat owner practical enough to cope with most maintenance I still had to think twice before delving into the guts of my gearbox. One imagines the need of…
Seized outboard engine – how to bring a Mariner 2hp back to life
The trouble began when I bought a rowing dinghy to use as a tender instead of a borrowed sailing club dinghy. Our trusty 1980s vintage Mariner 2hp outboard engine hadn’t…
Make your own impeller extractor – two DIY ideas that save money
John Cowan modified an automotive tool for his boat I had a problem removing my seawater impeller recently – the essential, delicate, flexible plastic paddlewheel that draws seawater up into…
Outboard maintenance tips – step by step 4-stroke guide
Wind, weather and the elements are the usual culprits when it comes to boat maintenance, however the 4-stroke outboard engine is best tended to from the inside out. Changing the…
How to clean an outboard motor carburettor step-by-step
If you have trouble with a small outboard motor it can often be attributed to the fuel. David Parker describes how he saved a lot of money with a careful…
Refurbishing a Yanmar 1GM10 water pump
The Yanmar 1GM10 is a great little engine, which starts first time and runs reliably: but there are one or two design flaws. The worst is that the raw water…