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Jim Hawkins
replied to the thread
F6 Yamaha Backpressure Issue???
.
I will do that although I want to note that with the rubber plug out the motor runs just fine, gets my little boat up on plane. I would...
Aug 31, 2026
Jim Hawkins
reacted to
99yam40's post
in the thread
F6 Yamaha Backpressure Issue???
with
Like
.
check compression, sounds like it is having a problem with the water back pressure when dunked(submerged)
Aug 31, 2026
A
AceDuece
replied to the thread
1985 Johnson 25hp J25TELCOS firing half as often on bottom cylinder at idle
.
91psi cold on both cylinders. Reading is from a gauge that consistently reads low as well, so guessing probably 100ish.
Aug 31, 2026
K
kirkj
replied to the thread
2001 Mag MPI Alpha lugs
.
I checked the timing and it's at 8 btdc and it advances about 34 degrees with throttle. This was on my driveway though. I will get a...
Aug 31, 2026
T
The nut
reacted to
dwco5051's post
in the thread
Need help! Mind of its own Johnson gt150😬
with
Like
.
My numbers were all in the low 90's not to long after a complete rebuild. I was told not uncommon on those old crossflows.
Aug 31, 2026
redneck joe
replied to the thread
80 HP Mercury trim
.
when you figure out what you have i can dig a bit deeper in the trouble shooting but based on your post i'm guessing a dual solenoid set...
Aug 31, 2026
redneck joe
replied to the thread
80 HP Mercury trim
.
Aug 31, 2026
redneck joe
replied to the thread
80 HP Mercury trim
.
Aug 31, 2026
M
mr 88
reacted to
airshot's post
in the thread
Boat purchase
with
Like
.
Starts and runs very well, idles good but a little high at 800 rpm. Bow high should be a trim issue that can be corrected unless there...
Aug 31, 2026
redneck joe
replied to the thread
80 HP Mercury trim
.
Aug 31, 2026
redneck joe
replied to the thread
80 HP Mercury trim
.
Aug 31, 2026
dwco5051
replied to the thread
Need help! Mind of its own Johnson gt150😬
.
My numbers were all in the low 90's not to long after a complete rebuild. I was told not uncommon on those old crossflows.
Aug 31, 2026
redneck joe
replied to the thread
80 HP Mercury trim
.
Aug 31, 2026
redneck joe
replied to the thread
80 HP Mercury trim
.
Aug 31, 2026
redneck joe
replied to the thread
80 HP Mercury trim
.
i did find my manual, it does not list the 80 hp however the trim system should be the same. Below are some pics, need to determine...
Aug 31, 2026
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