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Boat Repair/1975 johnson15hp outboard
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Question
I am having problems with cooling water. I replaced the whole water pump last season. I am getting very little water out the water exaust hole. I think their should be a steady stream when running. Any imput on what to look at next? It is a short shaft. Thanks to all
Jim, first of all check that the hose for the tale-tell is clear. Small insects like to crawl up the hose, or some debris can be stopping it up. If the engine is actually overheating you will need to check the thermostat, in is located in the water cover on the back of the cylinder head. Also the 9.9 and 15 were prone to collapsed grommets where the water tube goes into the powerhead, unfortunately you will need to remove the powerhead to do this. A service manual will go a long way.
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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