My 2003 V150TLRB VMax is hard to start after setting for a few days. We have been having a good discussion about cold starts in the Stratos/Javelin forum, but time to put this out on the motor forum.
We discussed the cold start procedures, but one issue sticks out regarding the fast idle feature.
My setup includes a Hot Foot and the VMax has carburetors.
Looking at my Seloc manual regarding fuel systems. It says some carburetors do not use a choke valve, but instead use an enrichment circuit which mechanically provides more fuel to the carburetor or intake during a cold start-up. I am assuming that the noise I hear when pushing in the key is fuel being injected into the carb.
Seloc manual goes on to say in the starting circuit section that the choke plate is closed, creating a partial vacuum in the venturi. How does the choke plate get get closed? We assumed it was when the throttle lever was taken out of drive mode and put into free acceleration mode, but that didn't seem to work.
I have read that yamahas have a manual choke on the side of the motor, but I don't see one on my V150TLRB.
Here is my sequence of events from yesterday's cold start after the motor setting for 3 days and not cold outside (50 degrees F)
Pushed in on the button on the bottom of the throttle lever and moved it forward.
Motor was level in a water flush bucket and fuel bulb pumped up until firm.
Turned key to on without starting
Pushed in key to enrich fuel system, let go of push
Turned key to start. No fire after about 5 seconds. Key back to on.
Pushed key in again, and turned to start. No fire.
Tried again, no fire
Held in key and turned to start, no fire
Back to push in, release, turn to start, about the 5th time she fired off. Died, push key in again and fired. Kept her running by pushing in the key every now and then.
Once she smothed out I moved the throttle lever back and forth. Nothing from the lever affected the rpm's. Got in the boat and worked the hot foot and rpm'@ reacted accordingly.
So I guess I'm asking for any clarification on cold start procedures in relation to fast idle and my setup
JR19 has given lots of info on cold start procedure and got me to the above sequence
Darksiede has posted that In most cases on older boats.. your hot foot is the ONLY throttle you have.. they disconnect the cable at the shifter disabling the throttle and high idle lever and it becomes a gear selector only.
Buzz88 and 201pro have also offered their personal expertise.
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Originally Posted by JR19
. Can only see it when the motor is trimmed down.
...in all seriousness if you get out this week try it and let us know what happens. FYI if your stating it on a garden hose they sometimes act different because without the motor being in the water there is no back pressure so they tend to idle a little different on a water hose. Be very careful giving it very much throttle on a water hose because the lack of back pressure will allow the rpms to climb through the roof in an instant. Never rev up a motor on the hose. Always keep the rpms low when on a water hose. Your best and true test will be at the lake with the lower unit submerged under the water.
