20 Most Recent Seloc Mercury Outboard Engine Repair Manuals SEC-1416 1990-00 2.5-275 HP Questions & Answers

a lot of the temp sensors you add on can not be wired to the temp alarm sensor. you will need a little bracket that bolts onto the head and holds the sensor next to the head. I would put to in the middle of the head to get the best reading.

Seloc Mercury... | Answered on Oct 26, 2019

cylinder head bolt
first torque 19 nm , second 37 nm and 3rd 90degree

Seloc Mercury... | Answered on Oct 23, 2019

I believe that motor has 3 carbs and the one feeding the #3 plug could be running too rich. May need adjusting or rebuilding.

Seloc Mercury... | Answered on Aug 23, 2019

lack of fuel flow
not advance on ignition
blocked main jets

Seloc Mercury... | Answered on Nov 23, 2017

0.45L / 0.48Qt
10W30 FC-W
There is also a sticker on the spinstarter

Seloc Mercury... | Answered on Oct 01, 2017

Box clogged?

Seloc Mercury... | Answered on Sep 25, 2017

If the trigger is not working it will not fire.. the trigger is kinda like a set of points in an older engine...tells the ignition when to fire..

Seloc Mercury... | Answered on Jul 10, 2017

With the info provide, sounds like you still have a bad solenoid..

1. Take your battery to a battery shop and have the cold cranking amps checked.

Seloc Mercury... | Answered on Jun 13, 2017


Seloc Mercury... | Answered on Jun 13, 2017

Go to boats.net - Mercury parts - search under hp/serial range - select 20hp 2 cylinder - it will be under the first selection 0A730007 and up.

Seloc Mercury... | Answered on Mar 15, 2016

when an engine stalls or looses power at high rpms , it is because there is a higher need for fuel to supply that requirement
fuel shortage can be from
blocked filters
low float levels in the carby/s
vent problem in the fuel tank/s
perished hoses letting in small quantities of air
the hoses failing intrenally and blocking off the fuel flow
pump problems from bad diaphragm or the rubber in the hose again blocking the main jets in the carby/s
another area to be checked is the ignition system being able to provide the spark at a higher rpms
this problem can be from failing condenser, ignition module or coil/s

Seloc Mercury... | Answered on Jun 27, 2015

water can get into the engine oil from several points
if the engine has a sump oil cooler hen the cooler coil wil be cracked or corroded at the seal points
more likely the housing behind the water pump has corrosion in it behind the impeller and water pressure is making it leak into the sump

Seloc Mercury... | Answered on May 19, 2015

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