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Boat Repair/100TLR79 - Evinrude

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Expert: Jeff Grigg - 2/16/2008


Question
I have a boat that has been setting up for ±5 years. I cleaned carb's last year but it was still running rough. The motor only has ±125 hrs on it. What is the best way to tune same? or What are the major components should I look at or change out to make it run smooth? Thanks, Kevin

Answer
I would rebuild the carb again with all new gaskets. Do a complete tune up including plugs, water pump, thermostat etc. Do a compression and leak down test. Check for excessive carbon build-up. Use a product like Power Tune to help clean out the carbon on the pistons and cylinder head, then use a product like Quickleen in your fuel to clean and keep clean the pistons and rings.
You may want to replace the head gasket and even the upper and lower seals, however that is optional.
Make sure all hoses are replaced all the way from the fuel tank. Examine and properly fix or replace any wires that are discolored, have cuts or scrapes from rubbing. Pay close attention to the spark plug wires.
Jeff

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Jeff Grigg

Expertise

Can help with most any question related to outboards, high performance, hull repair, rigging, if it floats and uses a motor. From a 9.9 on a aluminum boat to DFI two strokes. Outboard motors are my specialty. I can help with some I/O questions as well. Ratings are the only way we know if we are helping. If you are pleased with the help, please rate us. 20% don't bother reading my answers! If you are not going to read the follow up then why ask? Keep in mind we do this at no charge and are not paid. We do it to help you!

Experience

32 years in the marine business. Own a service facility, in coastal South Carolina certified Master Tech by Johnson/Evinrude, certified Mercury/Force, Tohatsu/Nissan. Former technical director for DMI Pistons. 30 year racing career including 3 APBA Formula V National Championships

Organizations
AMTECH, APBA

Publications Written For
Boat & Motor Dealer, Car Classics, Custom Vans (tech articles), Miami News, powerboat racing column

Awards and Honors
Certified Master Technician Johnson/Evinrude

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