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Engine serial #: 1B492182

#4 has what looks like wet plug.

little over 300 hours on engine since Injectors cleaned at 396.

mid rpm cruising speed hesitation. Acceleration and top speed...

Sweet! Thanks!

2007 Mercury Optimax Pro XS 250 Serial #:1B492182.

I am looking for the part number for the fuel injector harness connector (pig tail repair). I have two injector harness connectors that need...

Thanks!

2007 Mercury Optimax 250 S/N: 1B492812

What is a good method for cleaning carbon fiber reeds? Metal dust and debris from #2 failure covered the reeds for that cylinder. Reeds are fine just need to...

Yes I was.... running 76 mph and 5900 when it went.

Not original owner. This cylinder has not been repaired or re-sleeved to my knowledge. I did rebuild 200 hrs ago but #6 had a cold seizure. #2 was fine...

Update on inspection. Both pins are still in place. A little grinding and chipping and located both pins. Rings not rotated and are still inline with pin...
...

I figured the rod would be bent. Will do thanks for the advice. Also I did have a 27 Fury I ran and could never get it in the right RPM range which has been working on my mind as a possible issue. I...

Ok I will inspect for this. Reeds are intact and no missing pieces including #2 (New Carbon Fiber Reeds from European Marine compliments of Don) The pin location is so damaged it is pretty much...

Haha it’s an illusion and I believe it’s the master gasket (red) Looks like blood...

The bearings on #2 are fine. All bearings look like the picture. I have it completely torn down and am unable to pull freeze frame at the moment. I do know I always let it warm to 120 and above...

Very interesting points. I will look at this when I get home. Thanks!!

Oil deliver is good. New oil pump and did oil pump prime with Diacom software. l lost a piston ring locator pin on my last outboard (Ficht Evinrude) and the pin smash into the top of the piston about...

I don’t believe there was any damage from prior hairline crack. Replaced the front case half and ran several times with no power loss or any signs of damage. I recognized oil under the flywheel. Then...

2007 Mercury Optimax 250 Pro XS Serial #: 1B492182

Question for Don or anyone who wants to take a shot.

Optimax powerhead failure piston Number two. All other pistons and bearings are fine.
...

Ok, I do know that other people run optimax engines on the same boat (07 Blazer 202 Pro V bass boat) at higher jackplate settings. I will just have to keep an eye on it...


The power head gasket...

I had an issue with raising my engine jackplate and when I raise the jackplate above 2” below pad I’d get an overtemp on start up in the past.

Overtemp normally happened after a long idle (no...

Ok, fished a tournament last Saturday and the engine did not flare. I replaced the plugs with NGK-IZFR6J properly gapped and torqued. Engine ran great all day except one last issue...

When I shut...

Update:

I received the glycerin filled gages and my numbers are as follows:

running:
air 90 psi / fuel 105 psi

shutdown:
5 seconds air 84 / fuel 94
10 seconds air 78 / fuel 88

My pressure gauge may be off. I have glycerine filled gauges on the way and will recheck.

The part number for the rails: 8M6001787

rails recently replaced under warranty. Originally bought new...

2007 Mercury Optimax Pro XS 250 Serial #: 1B492182

Ok I have another issue as follows:

On first start of day the engine has a start up flare to 1600 rpm (neutral overspeed) and idle fluctuates...

Ok I figured it out. Ran on ears and pulled up the DIACOM and right away noticed the Starboard temp rising to 176. It reached 176 when the alarm went off. If that is too high then I don’t know why it...

https://i.postimg.cc/rwrRXJ8t/7-A3-F0-F99-3069-48-F9-8-D20-9-C16-E680901-D.jpg


https://i.postimg.cc/vThLnv1m/00-E0873-D-32-BB-4-BA6-B753-AB22-B65-A6443.jpg
...

I have DIACOM software and will video and show you what it’s doing. I’ll report back...