Engine stalling when cold
Submitted by grahaml on Wed, 2017-03-22 16:09
Gents
i have a Yamaha 100 four stroke done 330 hours and its just recently started giving me grief it will fire up when cold if a give it a bit of revs but stalls as soon as I put it into ggear if I warm it at 1000 to 1200 rpm for a few minutes it will be fine for the rest of the dday any thoughts on what's causing this
its not due a service till 400 hours
cheers
Samo76
Posts: 63
Date Joined: 17/08/08
IAC valve
IAC valve
Here I am...and there you are.
Auslobster
Posts: 1901
Date Joined: 03/05/08
Thermostat maybe?
...if it's stuck open, while take a while for cooling system to "warm up".
North Coast Marine
Posts: 74
Date Joined: 23/05/16
Depending on how old the
Depending on how old the motor is it may use Carbs and not Injectors, if this is the case then there may be some debris in the passages. The carb models have a very complicated choke/idle up system that can present issues as the hours increase, Second the thermostat issue, causes all sorts of havoc, give me a call if you want a hand 0409118903
Rob H
Posts: 5745
Date Joined: 18/01/12
Did Yamaha make a four
Did Yamaha make a four stroke 100 that wasnt EFI?
Common problem on the 115 Yam 4S was the TPS, which causes similar symptoms to that mentioned.
Give a man a mask, and he'll show you his true face...
The older you get the more you realize that no one has a f++king clue what they're doing.
Everyone's just winging it.
Travisd
Posts: 315
Date Joined: 07/05/11
Throttle indicator sensor
my two cents
Baron Sportsman
Just the depth that Varies
Travisd
Posts: 315
Date Joined: 07/05/11
Or
a throttle position sensor same thing
Jetpower fixed a friends that did that a month or so ago
Baron Sportsman
Just the depth that Varies