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March 18, 2019, 04:16:39 pm *
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 on: Today at 04:04:31 pm 
Started by jeffjam - Last post by Glen

 on: Today at 04:03:47 pm 
Started by jeffjam - Last post by jeffjam
Hi guys, I am new to the Mercury outboard and am in the process of purchasing a boat equipped with triple 300 Verados. I noticed a gap in the cowlings (shown in red square) on ALL 3 engines and wanted to know if this is normal for these engines. I would appreciate any feedback.

 on: March 17, 2019, 11:38:28 pm 
Started by zigzag930 - Last post by chico
Same effect different rainbow(sorry couldn't resist)self diagnosis Grin Grin Grin...Chico...

 on: March 17, 2019, 05:57:47 pm 
Started by zigzag930 - Last post by zigzag930
I will check on that next time I'm on the boat.  In the meantime, I did find that I have a starboard side trim cylinder that is leaking.  Some milky white fluid out the top of the ram cover.   Can that trim fluid have the same "rainbow" effect or would gasoline be the only possibility?

Not sure if I now have two problems or the trim may be the culprit for that "gas" looking effect.

 on: March 17, 2019, 11:08:40 am 
Started by MBean - Last post by MBean
Finally got this fixed FYI. Turns out it was the engine harness. Since that has been replaced haven't had a single issue.

 on: March 17, 2019, 08:14:52 am 
Started by zigzag930 - Last post by chico
If the rainbows are only present with motor running, check temperature(oil & water) to make sure you are not running cold. Also check oil level Motor could be compensating for not reaching operating specs. therefore overfueling and making oil is a possibility..Chico...

 on: March 17, 2019, 01:36:29 am 
Started by zigzag930 - Last post by zigzag930
A few days ago, I had a water in fuel alarm.  I dumped the Racor and the engine fuel filter (they in fact had quite a bit of water).  Motor was running fine, even with that water in there, although not sure how that could be.

Anyway, I changed the Racor and the engine filter.  Motor started up fine and is running perfectly.   However, I notice what appears to be fuel in the seawater surrounding the engine.  I pulled the upper cowing and do not see any leaks.  There are no leaks down in the bilge from the new Racor either.

I thought maybe some fuel spilled down in the midsection and would wash out after running.

Well after 30 mins, the "rainbows" in the water are still there, but far less.  Obviously this is only noticeable when the motor is in neutral and the boat isn't moving.  Sometime there aren't any, other times they are there.

The only other repair I made (along with the filters) was unscrewing the T-valve on the top of the engine, to clean it out - as my flush port was peeing water.  Can't see how that would be related...

Tomorrow, I will pull off the mid cowl as well to see if I can see anything else, but would like any input on known areas to look for problems.

I thought I read somewhere about a lower connection to the CAC that is a known problem?  Can find that information anymore.

 on: March 15, 2019, 02:24:29 pm 
Started by jaypete1 - Last post by Len R
 None of that info is correct.... Only issue has been with the fuel floats on the early 07 and below Gen 1 motors.....Easy fix. replace float switch..Absolutely  no issues with lower units or superchargers....I do have an issue with a motor thats 12 yrs. old and has only 125 hrs. on it.

 on: March 15, 2019, 01:40:30 pm 
Started by Gerald - Last post by Gerald
Hi to you all,I have a 10m RIB with twin Verado 300. I am thinking to upgrade my ECU's by Simon motor sports.Did anyone tried this upgrade ?
Any feedback ?

Thanks to all

 on: March 14, 2019, 10:06:59 am 
Started by jaypete1 - Last post by chico
There is a lot of information here in the library on the ethanol issue, after reading all you can repost with a specific question as to the problem you are experiencing so we can help. As for the other two issues you are referring to, they are not as common as you think and with a little research you will educate yourself...Chico...

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