Yamaha 9.9 High Thrust 4 Stroke Electric Start

gump218 · #1 December 29th, 2005, 02:13 PM

My 9.9 routinely has starting problems due to what I think is low voltage. Once I clean electrical connections, she kicks over fine.... Does a 9.9 4 stroke electric start provide any charging to the battery when running?

Also, I get a good idle and seem to get good high speed but there is a point where the engine tries to stall out during acceleration. If I milk the throttle, I can get thru that zone to high speeed. Ideas?

gump218 · #2 December 30th, 2005, 01:58 PM

This is a 1995 T.9.9EXHT 6G8UL 787273

ST · #3 January 3rd, 2006, 07:32 PM

The 1986 9.9 Yamaha service manual shows it has a "CDI magneto" charging system made by HITACHI. It says: "Lighting voltage: 10V or more at 3000rpm; 15+/- 1.5V at 5,500 rpm".

If I am not mistaken; my motor develops a reading of 14V or so when I ramped up the rpm higher than idling.

gump218 · #4 January 4th, 2006, 02:18 PM

Guess I can throw a meter onboard and take a reading while motoring... I'll check it out..

josef camilleri · #5 April 21st, 2009, 02:44 AM

Guys I am new here ,i am changing my engine for a 4 stroke yamaha or suzuki can anyone help please 150hp

gss036 · #6 April 21st, 2009, 01:36 PM

josef camilleri josef camilleri is offline
Cadet
You need to start a new thread/post and give more details on your boat and current engine.

Casco Bay Outrage · #7 April 21st, 2009, 06:41 PM

Gump -

Clean the carb for the stumbling. It is telling you there is gunk/trash. It will only get worse.