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Boat Repair/Replacing throttle mechanism and large amount of smoke
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Question
Jeff
I am considering purchasing a 1988 Stratos with a 150HP mariner, but it seems to need some work. Throttle is sloppy, and you have to have the throttle in full forward positon upon starting(Normal?). Once it fires you have to back it down. Lot's of smoke coming from motor and said to be caused by adding too much oil to fuel mixture. Compression is 115 on two, and 125 on the others(Concerns?)
Dan, it is a 20 year old motor. The compression is kind of uneven, it may be sticking rings. Some power tune or another spray carbon remover may help.
If you can try and look into the cylinders with a small "Bend a Lite" flashlight.
The smoking and hard starting can be from the uneven compression, an ignition problem or even a fuel/carb problem. I really wouldn't buy the too much oil excuse.
Before you spend your money have the boat and motor throughly checked out by a competent, experienced marine/outboard technician. It could be well worth the few dollars he would charge and could save you thousands.
Jeff
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| Rating(1-10) | Knowledgeability = 10 | Clarity of Response = 10 | Politeness = 10 |
| Comment | Thanks! I wasn't to comfortable with the excuse. I did notice a broken cap on the oil injector reservoir,which was replaced prior to test ride. Owner was concerned not enough oil was getting to the gas. I will have it checked out ASAP! | ||
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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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