Yamaha 200 Vmax

[MIH]

HI Guys,

Having messed around in various types of water in various types of boats, I decided to take the plunge and buy a Valiant Rib with a 200 V max early this year.

The engine has now developed a problem at Idle, whereby the revs drop to approx 500 and the engine appears to 'sneeze' and then stall. There appears to be no problem at the higher revs and I have lost no power / acceleration. All gaskets have been changed, Carbs stripped and cleaned and timing checked correct. After each 'sneeze' the engine starts perfectly well.

Any ideas as to the cause - severely scratching head now!

Regards

MIH

[Richard B]

Hi MIH,
Welcome to RIBnet. You may just find the answer to this if you do a search on "sneeze" as it's a symptom that's been discussed before.
HTH!

[Rene]

Hi MIH

Welcome to Ribnet

I would think that this is just a matter of idle speed adjustment.

500 is a bit low for this engine, it should run around 750 - 800

Regards
Rene