A little help with motor boat motor yamaha 85hp 2 stroke
Submitted by NightWolf on Sat, 2018-09-29 16:13
Hi under load its not got much go it sounds like it want to go kind like bogging down
what im wondering is what can ii look at do to try to fix it myself without taking it to a mechanic yet
it was runngn fiine but has sat for awhile im thinking of running it out of fuel and putting all new fuel in it im not sure if any water in tank or not ..
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Faulkner Family
Posts: 17868
Date Joined: 11/03/08
two things to look at first.
two things to look at first. 1 is fuel like you said the other is check your if its been sitting for a while check there is no blockage allowing air into the tank , no air flow will result in the motor starve for fuel
RUSS and SANDY. A family that fishes together stays together
Sam57
Posts: 104
Date Joined: 17/08/14
As above but also poss stuck
As above but also poss stuck closed thermostat. Some two strokes have a temp safety so will only rev to about 2000 if it gets hot to avoid cooking engine.
NORUN NOFUN
Posts: 1019
Date Joined: 15/08/11
I have seen fuel that has
I have seen fuel that has turned to jelly in the carbie bowls, this particular motor ran fine at idle then ran like shit under load due to the increased angle of boat shutting down the float prematurely and closing off the needle valve.
The worst part was that it was the last thing we checked - live and learn.
NightWolf
Posts: 641
Date Joined: 11/06/10
i think i have sorted the
i think i have sorted the fuel issue now will find out next time i take it out then i shall be going ocean and get some squid and fish