Ask Professor Diesel

How to exercise an unused engine

By | Posted May 2012

Sometimes I don’t have the time to actually take my boat out for two or three weeks at a time, but I do have time to run her Cummins diesels now and again. How often, how...

Read Article

How do I check for engines damaged by forgetting to open seacocks?

By | Posted April 2012

I left my marina with my seacocks closed. How do I know if I’ve damaged a head gasket or something else?

Read Article

Are end-of-season oil changes really necessary?

By | Posted January 2012

Should we do end-of-season oil changes or can we stretch the old oil into the next season?

Read Article

How do I care for my unused engine?

By | Posted November 2011

I plan on being away from my boat for two to three months and during that time, I plan on having someone periodically run my diesels dockside...

Read Article

Does an increase in horsepower explain a rise in exhaust temperature?

By | Posted October 2011

  Question: I have a 1989 38-foot Bayliner with twin 175-hp Hino diesels that have been retrofitted with turbochargers, thus raising each engine to 210 horsepower. As I go...

Read Article

Can switching motor oil viscosity harm my engine?

By | Posted September 2011

  Question: The boys at the Ko Olina harbor are having a heated discussion concerning motor oil. Since Costco hit town, we’ve all been able to buy Chevron 15W-40 Delo...

Read Article

Using synthetic oils in older engines

By | Posted August 2011

  Question: I own a 1996 43-foot Hatteras with twin six-cylinder Detroit Diesel engines. I change the oil approximately every 100 hours of operation. At this point, I have 1,...

Read Article

Vintage Yanmars Running Hot

By | Posted June 2011

  Question: I have a 29 Phoenix with twin, 1984-vintage, 170-hp Yanmar diesels with 1,000 hours on them. While the boat seems to run fine, I have one issue. During operation...

Read Article

Idling diesel engines

By | Posted May 2011

Question: My mechanic friends tell me not to let my diesel engine idle for long. They say that it should either be under load or turned off. I hear a lot of diesel engines in...

Read Article

Trouble-shooting an overheating boat engine

By | Posted April 2011

Question: I have a 1990 Carver Yacht with two 375-hp Caterpillar 3208 diesels. The starboard engine works fine, but at 2000 rpm the port engine overheats. Once the temperature...

Read Article

Seasonal Storage For Fuel Tanks

By | Posted March 2011

  Question: When I took your one-day Introductory Diesel Maintenance Course several years ago, I forgot to ask one question: What is the best way to lay up a fuel tank for...

Read Article

Aluminum in engine oil

By | Posted February 2011

  Question: I just did my first oil analysis on my Cummins 6BTA diesel, and the results seem somewhat disconcerting. According to the report, there was aluminum in the oil at...

Read Article

Caterpillar 3208 low rpm

By | Posted January 2011

  Question: I have a 1989 Sea Ray with 375-hp Caterpillar 3208 diesels. Last year I overheated one of them and blew a head gasket. Overheating had been a problem for some...

Read Article
Vetus Maxwell Tip of the Week

Hot Today

Featured Brands

Costa Palmos logo MCY logo
HMY Yacht Sales logo Volvo Penta logo
Absolute logo Sunseeker

Boat-Name Generator

cube puzzel Thinking of a unique name for your new boat can be tough, that's why we created a Boat Name Generator.
Try it here. ▶

Select Brokerage