Cool Exchange Page 2
Q & A — May 2002
By Capt. Ken Kreisler
2: Outboard maintenance, epoxy resin tips, and more.
inherited a 40-hp outboard. What points on the drive unit should I check
as part of a regular maintenance schedule? K.T., via e-mail
At the same time note the color of the lube oil. If it's cloudy, you've got a leak, probably around the prop seal. Have this fixed immediately. When replacing the screw, make sure it's seated properly and in tight.
Next, check the condition of the zincs you can't see, especially the one inside the lower unit in front of the prop. You also may have a large zinc brick up under the transom bracket. As long as each is intact, you're still protected. However, if one of your zincs is at least half-worn since you checked it last, this is a sure sign you've got a corrosion problem somewhere.
Third, look for nicks and scrapes on the drive unit, and touch up any with the paint recommended by your engine manufacturer. If not, you will be inviting corrosion problems.
And last, regularly check for leakage around the trim cylinders, loose parts or wires, and any kind of obvious damage.
are some tips for preventing epoxy resin from running or sagging?
W.R., via e-mail
The second is too slow a cure. Make sure the ambient temperature you are working in is warm--72°F is ideal. If you are working in cold weather, between 40 and 50ºF, warm the resin and hardener before mixing them to speed the cure. Or you can use a faster hardener. Check with your manufacturer's instructions for mixing and application and always follow them carefully.
is meant by oil oxidation in a diesel engine? G.D., via e-mail
Lube oils are formulated with additive packages to control, but not eliminate, oxidation. Choose oil with the proper rating and weight, and change it regularly as the additives wear out. If you have any questions about this, refer to your engine reference book or contact your engine manufacturer.
help with a maintenance problem? Write to Maintenance Q & A, Power
& Motoryacht, 260 Madison Ave., 8th Fl., New York, NY 10016. Fax:
(917) 256-2282. e-mail:
No phone calls, please.
This article originally appeared in the January 2003 issue of Power & Motoryacht magazine.