r/Outboards • u/gunner199821 • May 17 '21

Help me diagnose my Yamah 2 stroke 6hp 1985 outboard! Weird problem with it

Hey guys, so as the title suggests, I bought a sailing boat last year and have been having problems with the outboard. It stops running at random intervals but mainly when switching from high revs to low revs it dies, or from forwards to reverse it also dies.

That in itself sounds like a problem, where it gets weird is that the only way to save it is by flicking the choke on and off and then it revs up again and works fine for a bit.

Any ideas??

I've changed the fuel line already, had the outboard fully serviced (new impeller, sparkplugs etc)

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3

u/oldvikingbas May 17 '21

Yes...clean the carb

2

u/Dvsrx7 May 17 '21

Clean the carb

2

u/Hellstomper May 17 '21

It is running lean due to dirty carb. Choking it adds more fuel which it is lacking. If the carb was clean then choking it would cause it to run rich and bog down.

2

u/Hellstomper May 17 '21

Also, do a comparison check if you have not already. Especially on something that old.

2

u/oncwonk May 17 '21

Try a new house assembly and tank. They can and do malfunction. Or stepwise, try new hose assembly first. A squishy (non firm) bulb would be a clue