View Full Version : 20HP Evinrude Controls
Dory4.1
06-07-2006, 08:08 PM
Hi All,
I have a 1994 20HP Evinrude 2 stroke. Its was 2nd hand when I bought it, and didn't come with any user manual. The engine starts and runs well, but sometimes doesn't like to idle. I think the problem may be the base idle adjustment. However I haven't completely ruled out user error.
Apart from the hand throttle and gear lever, it has a primer on the front of the outboard that I pull out a couple of times before starting, and some sort of knob on the end of the hand throttle.
Can anyone tell me the correct operating process for the primer, does it need to be pushed back in until it clicks into its "home" position, and does turning the knob on the end of the throttle effect the idle speed?
Any advice appreciated.
Rgs
Michael
blaze
06-07-2006, 10:18 PM
Hi Michael
Not 100% on your motor but try this
Knob on end of throttle is possible a friction control adjustment so the postion of the twist grip is maintained or loosen off for easier rotation.
The knob you are pulling out is probably a choke, pull out to start motor and as motor warms up gradually push in.
Primer bulb in fuel line needs to be pumped until it is firm before attemps are made to start the motor, often only needed for the first start of the day or maybe after an extended period at anchor.
hope this is of some help
cheers
blaze
Spaniard_King
07-07-2006, 01:53 PM
Hi Michael,
this one slipped past me ::)
The knob you speak of can be used as an idle adjustment, basically it will limit the travel of the throttle so you can set it to keep the engine idling at YOUR desired revs.
The choke you have is like a small pump, when you pull it out it squirts fuel into the inlet manifold.
My routine for using this is as follows
raise RPm by using the throttle a bit to aid starting
by using the primer/choke give the engine 2 good squirts leaving the knob out from its seat.
Pull the engine till it starts
when engine is running push the choke knob all the way in (sometimes you need to leave this knob out a bit until the engine is warm or you move off in gear)
hope that helped
cheers
Garry
blaze
07-07-2006, 03:42 PM
I just as well been 10000 miles away, thanks for clearing up Gary as I was only guessing
cheers
blaze
seatime
07-07-2006, 04:36 PM
Hi Michael,
this one slipped past me ::)
The knob you speak of can be used as an idle adjustment, basically it will limit the travel of the throttle so you can set it to keep the engine idling at YOUR desired revs.
The choke you have is like a small pump, when you pull it out it squirts fuel into the inlet manifold.
My routine for using this is as follows
raise RPm by using the throttle a #bit to aid starting
by using the primer/choke give the engine 2 good squirts leaving the knob out from its seat.
Pull the engine till it starts
when engine is running push the choke knob all the way in (sometimes you need to leave this knob out a bit until the engine is warm or you move off in gear)
hope that helped
cheers
Garry
Hi Spainard King
When you say give it 2 good squirts, does that mean pulling out the choke and pushing in twice than leaving it out?
I'm having trouble nailing the start sequence on my Mariner 2st 30hp, about 30hrs use. Maybe I don't give it enough choke, or enough throttle, 4-5 pulls and I'm more excited than the donk. I really think it should start in 2 pulls. Also it takes about 15-20 seconds for the tell tale to squirt when flushing, and only 3 seconds in the drink! is this normal?
I normally squeeze the thingy till its firm with fuel, pull choke all the way out, a little bit of throttle then pull, when she fires I push the choke in and raise the revs. Maybe its just a carby 2 st thing. Any comment appreciated. cheers, Steve.
Spaniard_King
07-07-2006, 07:56 PM
Steve,
I would try to use more choke, I am not familiar with the choke system on your mariner. Your routine looks sound I think a bit more choke if anything try the 2 squirt choke routine. One tip is if you get a 2 stroke to fire that is enough choke.. turn the choke off or you will only flood it ::)
The tel tail will always be a lot slower on the muffs dont worry to much about it as long as ya get something.
cheers
Garry
Dory4.1
07-07-2006, 07:58 PM
Garry, Blaze,
Thanks for the advice. It sounds like I need to wind the idle adjustment knob up to keep the motor running at idle.
Garry, you got it 100% right describing the choke as being like a small pump that squirts fuel into the inlet manifold, I guess this primes the motor, and saves on some hard work cranking (read pull starting) the motor over to get fuel into it.
Gelsec, this carbie doesn't have a choke butterfly as such, so I don't know if the priming procedure Garry mentions will apply to your motor.
Thanks
Michael
seatime
07-07-2006, 08:16 PM
Thanks Gary & Michael
It'll probably get easier with use, and practice. Can't complain about the performance tho. This Mariner (Tohatsu in drag) really squirts a 4m tinnie along. No GPS, but I'd guess late 20s lightly loaded at WOT, its easy to get out of the water.
regards, Steve.
Powered by vBulletin® Version 4.2.3 Copyright © 2024 vBulletin Solutions, Inc. All rights reserved.