9.9 Evinrude - Hard Start when warm , but starts fine when cold

Crosbyman

Vice Admiral
Joined
Nov 5, 2006
Messages
5,440
ok found someting ...try cooling the ignition module and coils

no need to buy condensers :)
1653626855266.png
 

flyingscott

Fleet Admiral
Joined
Apr 8, 2014
Messages
8,092
well having a model # will help pick a diagram in the mean time ...cooling suspect parts to restore sparks may help. shooting coolant spray on the ignition coils could help pinpoint problem components & restore ignition

racerone... how about sharing that model #
The OP put a pic up, shows it to be a 93 or newer model.
 

909

Chief Petty Officer
Joined
Jul 19, 2021
Messages
537
Yes , I forgot to mention it's a 1998.

Could there be an internal blockage, old pieces of an impeller, lake debris, calcium buildup, blocking a passage in the head, causing part of the head to overheat.
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
37,818
Test the spark when motor refuses to start warmed up.-----Assumptions get no results !
 

Crosbyman

Vice Admiral
Joined
Nov 5, 2006
Messages
5,440
if heat keeps it from starting ....change the condition
The OP put a pic up, shows it to be a 93 or newer model.
sorry my limited experience did not permit me to rapidly determine the year of manuf. I'll leave this one to you and 909 to sort out. .

looking forward to a happy ending.
 

flyingscott

Fleet Admiral
Joined
Apr 8, 2014
Messages
8,092
if heat keeps it from starting ....change the condition

sorry my limited experience did not permit me to rapidly determine the year of manuf. I'll leave this one to you and 909 to sort out. .

looking forward to a happy ending.

if heat keeps it from starting ....change the condition

sorry my limited experience did not permit me to rapidly determine the year of manuf. I'll leave this one to you and 909 to sort out. .

looking forward to a happy ending.
Why so thin skinned? I just pointed out what a 93 and newer 9.9/15 hp looked like.
 

roscoe

Supreme Mariner
Joined
Oct 30, 2002
Messages
21,739
I'll run it WOT for a good amount of time. Then kill it.
After shutting it down, how much time goes by before you try to start it?

What if you try to restart it right away?
Or 10 minutes later?
Or an hour?

Is it harder to restart the longer it sits?
 

909

Chief Petty Officer
Joined
Jul 19, 2021
Messages
537
Most of the time I try to restart it immediately with a lot of difficulty
 

oldboat1

Fleet Admiral
Joined
Apr 3, 2002
Messages
9,612
Infrared testers are pretty cheap. Get a measurement when warmed up, then when it won't start. 160F is overheating (top of cylinder head).
 
Last edited:
Top