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I have a 1996 hydro sport fish and ski with a 150 ,it has a…

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I have a 1996 hydro...
I have a 1996 hydro sport fish and ski with a 150 Johnson,it has a vibration
Submitted: 11 months ago.Category: Boat
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Answered in 8 minutes by:
8/6/2017
Marine Mechanic: Charles, Marine Mechanic replied 11 months ago
Charles
Charles, Marine Mechanic
Category: Boat
Satisfied Customers: 4,730
Experience: US Navy (Ret) Certified Mercury Marine Tech with over a decade of repair experience.
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Hello, my name is***** will assist you.

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Marine Mechanic: Charles, Marine Mechanic replied 11 months ago

Would you please post the full model number of the engine?

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Customer reply replied 11 months ago
Johnson j150elebd
Customer reply replied 11 months ago
Text is fine
Marine Mechanic: Charles, Marine Mechanic replied 11 months ago

Thanks. First off, check the prop and make sure that there are no bent blades. Then with the engine off and it trimmed up in neutral, spin the prop while watching he center of the prop shaft. Make sure that it is not out of round.

If these are good, trim the engine down, pull all 6 spark plugs and go a compression test and a spark test on the engine. For the spark test, you will need an adjustable gap spark tester. Set it to 7/16" then watch for spark in it when cranking the engine over. You can rent these tools from most chain auto parts stores. For compression oyu are looking for numbers over 90 PSI and all with-in 10 PSI of each other.

Let me know what you see there and we an continue.

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Customer reply replied 11 months ago
Thanks done a compression check,everything is right at 120
Marine Mechanic: Charles, Marine Mechanic replied 11 months ago

I would do spark and check the prop and prop shaft.

Has the boat been sitting for some time?

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Customer reply replied 11 months ago
Not that I know of
Marine Mechanic: Charles, Marine Mechanic replied 11 months ago

Ok, either the spark or the prop check should show something.

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