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Forum: Engine / Drive Train 01-18-2016, 10:47 PM
Replies: 29
Views: 9,481
Posted By Engine Nut
The LT1/LTR takes a different pump. Indmar P/N...

The LT1/LTR takes a different pump. Indmar P/N 685020-1. The flange that attaches to the crank is different.
Forum: Engine / Drive Train 11-25-2015, 10:49 AM
Replies: 22
Views: 1,503
Posted By Engine Nut
These folks are a good source for TBI Info. They...

These folks are a good source for TBI Info. They also do carburetors at www.guaranteedcarbs.com

Throttle Body Injection
Division of Guaranteed Carburetors, Inc.
7939 Ulmerton Road
Largo, FL...
Forum: Engine / Drive Train 11-07-2015, 01:51 PM
Replies: 9
Views: 960
Posted By Engine Nut
Don't worry too much about using marine specific...

Don't worry too much about using marine specific oil. Most major brand oils have the required specifications and additives to protect your engine. The 40wt recommendation was just because in testing...
Forum: Engine / Drive Train 09-10-2015, 04:33 PM
Replies: 24
Views: 6,696
Posted By Engine Nut
Make sure that you drain the water from the...

Make sure that you drain the water from the manifolds when the boat isn't going to be used for more than a couple of days. That will prevent the new plugs from being damaged by electrolysis which is...
Forum: Engine / Drive Train 09-06-2015, 10:48 AM
Replies: 15
Views: 1,167
Posted By Engine Nut
The HO engine got GT40 heads and a different cam....

The HO engine got GT40 heads and a different cam. The heads only will get you part way there.
Forum: Engine / Drive Train 08-03-2015, 04:05 PM
Replies: 4
Views: 357
Posted By Engine Nut
That engine used a 55A Prestolite Alternator....

That engine used a 55A Prestolite Alternator. Indmar P/N 755024. You can get one under that P/N from inboardonline.com
Forum: Engine / Drive Train 04-13-2015, 12:16 PM
Replies: 24
Views: 6,696
Posted By Engine Nut
I suspect that there was some water that didn't...

I suspect that there was some water that didn't get drained from the manifold.
Forum: Engine / Drive Train 04-13-2015, 10:22 AM
Replies: 24
Views: 6,696
Posted By Engine Nut
I suspect the manifold will have to come off....

I suspect the manifold will have to come off. That damage is caused by electrolysis. The plug is more electrically active than the manifold so it acts like an anode. When water is in the manifold...
Forum: Engine / Drive Train 12-14-2014, 12:56 PM
Replies: 5
Views: 1,347
Posted By Engine Nut
The Indmar P/N for that regulator is 556125. It...

The Indmar P/N for that regulator is 556125. It is a vacuum actuated 3 Bar regulator ... approx. 45 PSI.
Forum: Engine / Drive Train 10-24-2014, 08:05 PM
Replies: 10
Views: 1,108
Posted By Engine Nut
We can't put the full cold mark on here because...

We can't put the full cold mark on here because the level varies with the angle of the boat. There are probably no two that are exactly the same so it is best to do that with the engine in the boat...
Forum: Engine / Drive Train 10-24-2014, 02:00 PM
Replies: 10
Views: 1,108
Posted By Engine Nut
Here is the correct procedure for checking the...

Here is the correct procedure for checking the trans fluid.

Start engine and let it come up to operating temperature (160F)

Shift transmission to forward and back to neutral then to reverse and...
Forum: Engine / Drive Train 08-22-2014, 03:29 PM
Replies: 31
Views: 3,759
Posted By Engine Nut
The LY6 RPM "Hunting" issue when cold was due to...

The LY6 RPM "Hunting" issue when cold was due to the fact that this was the first engine with variable valve timing. The surging was due to the amount of time that it took for oil to travel through...
Forum: Engine / Drive Train 07-23-2014, 03:36 PM
Replies: 11
Views: 1,134
Posted By Engine Nut
Indmar has the springs in stock. The P/N for the...

Indmar has the springs in stock. The P/N for the springs in a conventional distributor is 755023 and for an electronic distributor 755022.
Forum: Engine / Drive Train 06-16-2014, 02:59 PM
Replies: 34
Views: 2,008
Posted By Engine Nut
Yes, all codes are stored in the ECM.

Yes, all codes are stored in the ECM.
Forum: Engine / Drive Train 06-16-2014, 09:30 AM
Replies: 34
Views: 2,008
Posted By Engine Nut
Your 2006 MCX does not have the single pole temp...

Your 2006 MCX does not have the single pole temp switch ... only the two wire coolant temp sensor.
Forum: Electrical 06-12-2014, 09:03 AM
Replies: 7
Views: 784
Posted By Engine Nut
The ECM does have some protection against reverse...

The ECM does have some protection against reverse polarity but the ignition module in the distributor does not. The first things to go in a reverse polarity situation are the ignition module in the...
Forum: Engine / Drive Train 06-09-2014, 02:28 PM
Replies: 10
Views: 538
Posted By Engine Nut
That is not good. There is a rubber plug that...

That is not good. There is a rubber plug that generally goes into that hole. The shaft that you can see in the hole has three sealing rings that seal the rotating shaft and keep the oil, which at...
Forum: Engine / Drive Train 06-09-2014, 10:00 AM
Replies: 6
Views: 935
Posted By Engine Nut
I have attached our recommended valve lash...

I have attached our recommended valve lash adjustment procedure. We recommend zero lash plus 1/2 turn not one full turn like they do in automotive applications.
Forum: General Discussion 06-04-2014, 11:51 AM
Replies: 23
Views: 1,663
Posted By Engine Nut
Some of those engines were built with two...

Some of those engines were built with two temperature measuring components. One was a single wire sensor that was used to drive the gauge and the other was a two wire sensor that sent a signal to the...
Forum: Engine / Drive Train 06-03-2014, 10:37 PM
Replies: 8
Views: 796
Posted By Engine Nut
That's what the chart says!

That's what the chart says!
Forum: Engine / Drive Train 06-03-2014, 11:33 AM
Replies: 8
Views: 796
Posted By Engine Nut
Scroll through and you will find the specs for...

Scroll through and you will find the specs for the LT1 head bolts.
Forum: Engine / Drive Train 07-07-2013, 10:40 AM
Replies: 13
Views: 2,727
Posted By Engine Nut
Th speedi-sleeve is the only way to address the...

Th speedi-sleeve is the only way to address the issue. Replacing the entire hollow shaft that runs through the transmission is an extremely difficult an expensive job. There is a service manual for...
Forum: Engine / Drive Train 07-07-2013, 10:21 AM
Replies: 3
Views: 483
Posted By Engine Nut
You can replace the pump with the boat in the...

You can replace the pump with the boat in the water. Doesn't your boat have a sea **** near the water pickup in the hull? Otherwise, keeping the water inlet hose above the water level will prevent...
Forum: Engine / Drive Train 07-05-2013, 12:21 PM
Replies: 13
Views: 2,727
Posted By Engine Nut
My experience tells me the transmission output...

My experience tells me the transmission output shaft seal in the side of the transmision closest to the engine is probably leaking. The transmission needs to come out of the boat to resolve. This is...
Forum: Engine / Drive Train 06-23-2013, 09:28 AM
Replies: 4
Views: 488
Posted By Engine Nut
The oil sender is right above the oil filter. The...

The oil sender is right above the oil filter. The Indmar P/N is 645002. The impeller is 685007 and the impeller gasket is 685008. You can get them from inboardonline.com under those part numbers.
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