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June 24, 2018, 09:46:05 pm *
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 1 
 on: Today at 06:12:39 pm 
Started by vaaav11 - Last post by Terso01
That sounds very similar to the problem I just had on my 300 pro. It turned out to be a bad coil on cylinder 1 that would only start to fail when it was under load. Top end I could only pull 5000-5200 rpm. I did a bunch of reading and did an coil drop test in the back yard but everything was fine so I grabbed a friend and went down and backed it into the boat launch and just left it on the trailer and idled it up in gear until it would start to fail. Then one at a time un plugged each coil listening for a noticeable change in the engine. Mine only had 15 hours on it when it failed.

 2 
 on: June 23, 2018, 12:46:34 pm 
Started by Hot Boat - Last post by Hot Boat
on my 2017 350 verado I been getting a critical over temp alarm.  6 beeps folowed by a 75% guardian mode.  my max rpms are only 5000 vs 6000. if i shut the key off and restart the motor it will re set out of guardian mode. the alarm comes on under power about 4500 rpm. if i back off the throttles slightly the alarm shuts right off. here is a list of what i have done so far


changed oil and filters
replace spark plugs
replaced thermostat
replaced poppet valve
swapped over water temp sensor to other motor

at around 4250 RPM
water pressure on both motors is around 12.8
water temp is around 145
boost pressure is 22.8 on the troublesome engine


the alarm comes and goes, i had issues for three days on and off, then everything cleared up for a few days and about 100 gallons of fuel consumed at all different power ranges and 5-10 minutes at wide open throttle, immediately after i re fueled the boat the alarm started coming back on consistently unless i'm below 4000 RPM

today i swapped over the air temp sensor to the super charger and verified that the super charger was getting water flow and ports were clear. i also have very strong water flow from the water pisser on the cowling from both motors.

any ideas of what else i shoud look for. my mechanic is weeks backed up.

 3 
 on: June 23, 2018, 03:14:14 am 
Started by HyperTab - Last post by HyperTab
Next Generation 350 - 550 Verados:

A brand new i6 3.45L Supercharged or NA 5.75L V10 (Existing V8+2 cyl) ... what's the pros and cons?

(i6 3,45L = 575ccm each cyl x 6)
(V10 5,75L = 575ccm each cyl x 10)

My prediction is that Mercury want to keep the weight down and the width and still be able to reach close to 7000rpm -> i6 Supercharged.
But some say a V10 NA 5.75L is on the way ... someone?

 Huh?

 4 
 on: June 22, 2018, 10:36:26 pm 
Started by vaaav11 - Last post by vaaav11
No one knows the answer

 5 
 on: June 22, 2018, 09:47:46 pm 
Started by luv2fishkim - Last post by blkwtr
Not smoke.  Steam.

 6 
 on: June 22, 2018, 08:34:54 pm 
Started by UCPA111 - Last post by UCPA111
Had a new 300 Verado (supercharged) rigged onto my project boat (1983 grady white seafarer 226).  Runs very well.  Having difficulties with vessel view 502 interface.  Hoping my dealer can get that wrapped up. 

Here's hoping I made a good choice by choosing Verado vs Yamaha.  I will say that cruising at 27 mph and hitting the throttle = BETTER BE HOLDING ON!  WOW!

https://www.youtube.com/channel/UCATvLuuBWqIPmRX0gH9FiMQ

 7 
 on: June 21, 2018, 03:53:34 pm 
Started by luv2fishkim - Last post by Glen
White smoke=normal, condensation
Blue smoke=burning oil-bad

 8 
 on: June 21, 2018, 03:46:49 pm 
Started by luv2fishkim - Last post by luv2fishkim
Hi forum

This is my first post

I have a 2008 225 Verado that has white smoke coming from the exhaust after I run the motor 10 min at 40 MPH.   I see the white smoke when I idle back down .I have about 180 hours on the motor.

Thanks Kim Sprague

 9 
 on: June 21, 2018, 02:53:24 pm 
Started by 23MAG - Last post by Gbaudin2
Congrats on your 23Magnum with the 350Verado!!.  Just got a call this week from CM.  They started the fiberglass work for my 24HO, just like you I went with the 350 Verado.  The 300's were no longer available and the choice was the new year model V8-300 or the 350Verado.  Cant wait to take delivery of mine, How does that Magnum ride and perform with the 350?

The 20 hour service may just be what CM recommends after break-in.  I will be performing the same service also once mine hits 20 hours (engine oil and lower unit oil change)

 10 
 on: June 21, 2018, 02:25:44 pm 
Started by 23MAG - Last post by Glen
Guaranteed your dealer is jacking with you… If it's not in the manual,  it's not valid. Ask him to show you something from mercury in writing that says that there's a 20 check. If there is, it will be the first I've ever heard of it.

Makes you wonder about your hot start problem and mercury not having a fix for it.

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