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My 50 ho 4 storke was stored for over a year it started like a dream and idles great but when you advance the throttle to mid range it seems to de tune and misses like crazy until you bring her back d

My suziki 50 hp 4 stroke was stored for a year it started great and idles great but when you bring he up to RPM at about half throttle she seems to de tune and misses like crazy until you bring it back below half throttle change water pump impeller lots of water and engine cool oil ok HELP

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  • Warren Nygaard
    Warren Nygaard Feb 08, 2014

    I am leaning toward fuel as no alarm bells just runs terrible when you accelerate


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  • 415 Answers

It sounds like the high speed passages in the carb are gummed up. If you have not done so already, you should probably rebuild the carb.

Posted on Apr 03, 2014

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Posted on Jan 02, 2017

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SOURCE: 15 hp outboard 2 stroke running with water muffs

Impeller is at the bottom in the housing. it may take a few mins for the water to come out of the tell tale hole. Ensure that your muffs are on properly and wait for a bit. Also insure that the hole is not plugged.

Posted on Sep 14, 2009

  • 1 Answer

SOURCE: 1987 Bayliner capri 85hp force starts and idles fine,after it

if u have a seperate onboard tank i bet its the vent valve is closed

Posted on Jul 20, 2010

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SOURCE: Mariner 2 hp outboard engine (1985) not pumping water

My Mariner 8 has a thermostat fitted. It only pumps water when it heats to normal temp.

If your engine stops, it may be a fuel problem. Check the plug and go to Marine Doctor (a) fuel diagnostics, (b) spark plug diagnostics, sections. PK

Posted on Aug 14, 2010

Testimonial: "Thanks Peter, we will certainly try what you have said."

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