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Search: Posts Made By: blue thunder
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Forum: General Q & A
04-29-2020, 09:29 AM
Replies: 41
Views: 3,159
Posted By blue thunder

I run 177s (525sc take offs w/ dominators) with...

I run 177s (525sc take offs w/ dominators) with 741 cams and closed cooling. I run approx 9.3:1 compression with aluminum heads. I run a v-6 module with 31* timing all in. With closed cooling I...
Forum: General Q & A
04-26-2020, 03:22 PM
Replies: 41
Views: 3,159
Posted By blue thunder

If it were bad gas or too much timing the pistons...

If it were bad gas or too much timing the pistons tops would look sand blasted. Use cometic mls head gaskets and arp studs on rebuild. Then before running again rebuild the carb, suck out every...
Forum: General Q & A
03-13-2020, 10:06 AM
Replies: 5
Views: 462
Posted By blue thunder

The gimbal bearing is in fact called a cartridge...

The gimbal bearing is in fact called a cartridge bearing. That means the bearing part is spherical and can be rotated 90* and removed from the housing to replace the bearing while leaving the...
Forum: General Q & A
03-13-2020, 08:59 AM
Replies: 37
Views: 2,464
Posted By blue thunder

I agree with the above. Center the engine in the...

I agree with the above. Center the engine in the boat and tighten the rear mounts. Install alignment tool into coupler and using a mallet tap up/down left right on end of mallet until alignment...
Forum: General Q & A
01-23-2020, 08:51 AM
Replies: 74
Views: 8,950
Posted By blue thunder

Are you running the engines with only 2 bolts...

Are you running the engines with only 2 bolts holding the manifolds to the heads?

BT
Forum: General Q & A
05-06-2019, 10:42 AM
Replies: 4
Views: 486
Posted By blue thunder

Are you using the merc alignment tool? If so and...

Are you using the merc alignment tool? If so and if you have it as low as possible for it to still be aligned, you may want to put a shim plate under the mount base.
Forum: Wanted
04-23-2019, 06:56 PM
Forum: Wanted
04-23-2019, 12:39 PM
Replies: 4
Views: 266
Posted By blue thunder

I have 2 qjets that came off merc 502 mags, 1992...

I have 2 qjets that came off merc 502 mags, 1992 vintage iirc. They were working when taken off but probably would be good to go through them.

BT
Forum: General Q & A
03-27-2019, 07:11 AM
Replies: 7
Views: 324
Posted By blue thunder

Glad to help and I agree with your conclusion. ...

Glad to help and I agree with your conclusion.

BT
Forum: General Q & A
03-26-2019, 02:04 PM
Replies: 7
Views: 324
Posted By blue thunder

weight x moment arm (length of idler) = torque. ...

weight x moment arm (length of idler) = torque. You'll have to solve for weight. Whatever rpm you spin your engine to x 2 will be the max rpm of the bearing iirc. Good luck.
Forum: General Q & A
03-26-2019, 12:47 PM
Replies: 7
Views: 324
Posted By blue thunder

Then you can figure out how much load is on the...

Then you can figure out how much load is on the bearing and see what kind of room you have to work with at 14000rpm. Here is the bearing number.
SKF 6304 for the snout bearing

BT
Forum: General Q & A
03-26-2019, 11:56 AM
Replies: 7
Views: 324
Posted By blue thunder

You could always use a torque wrench to measure...

You could always use a torque wrench to measure how much additional torque will be on the idler arm at +30* preload. That will also allow you to see if it can actually be preloaded by 30* more...
Forum: General Q & A
03-12-2019, 06:05 AM
Replies: 38
Views: 2,699
Posted By blue thunder

I'd try a set of unmolested 32p bravo 1s. I'd...

I'd try a set of unmolested 32p bravo 1s. I'd avoid using a 5 blade prop on a bravo drive high hp single engine boat.
Forum: General Q & A
03-11-2019, 01:48 PM
Replies: 38
Views: 2,699
Posted By blue thunder

You probably need a higher pitched prop. If you...

You probably need a higher pitched prop. If you added 200hp and still have the same prop as b4 it would be like putting donut tires on a 1/4 mile drag car.
01-13-2019, 01:41 PM
Replies: 10
Views: 1,238
Posted By blue thunder

As long as the blower itself didn't seize you can...

As long as the blower itself didn't seize you can get home with no belt. It will spin letting air in. If blower is not able to spin though, no air intake.
Forum: General Q & A
01-13-2019, 01:28 PM
Replies: 11
Views: 1,253
Posted By blue thunder

I would ask the builder what ICL the cam was...

I would ask the builder what ICL the cam was installed at. Its possible he did not degree it and it is off causing too much EVC angle. I've seen cams being off as much as 6 degrees when being...
Forum: General Q & A
12-17-2018, 10:17 AM
Replies: 14
Views: 1,540
Posted By blue thunder

How does a leaking riser gasket create more...

How does a leaking riser gasket create more vacuum?
Forum: General Q & A
12-17-2018, 07:56 AM
Replies: 14
Views: 1,540
Posted By blue thunder

I believe the joint betw the riser and manifold...

I believe the joint betw the riser and manifold on your setup is dry so that gasket leaking shouldn't result in water reversion.
Forum: General Q & A
12-16-2018, 04:18 PM
Replies: 10
Views: 766
Posted By blue thunder

Is it a mercruiser setup?

Is it a mercruiser setup?
Forum: General Q & A
12-16-2018, 02:49 PM
Replies: 22
Views: 1,230
Posted By blue thunder

The good news is your temp problem is on the easy...

The good news is your temp problem is on the easy side to address. Too hot can be much more of a challenge. If you get the gauge working correctly and are still having low oil temps when sea temp...
Forum: General Q & A
12-15-2018, 03:49 PM
Replies: 14
Views: 1,540
Posted By blue thunder

Sounds like reversion. May not end up being a...

Sounds like reversion. May not end up being a problem if you used inconnel exhaust valves and try to keep the engine off idle as much as practical. Things other than water leaks that could cause...
Forum: General Q & A
12-15-2018, 03:43 PM
Replies: 22
Views: 1,230
Posted By blue thunder

It will eventually start causing milky looking...

It will eventually start causing milky looking engine oil/cream cheese breathers because the oil isn't getting hot enough to steam off the condensation. I had this problem at one time and ended up...
Forum: General Q & A
09-09-2018, 05:28 PM
Replies: 18
Views: 7,441
Posted By blue thunder

ngk vee power 9 heat range. 11.8-12 wot and 13.5...

ngk vee power 9 heat range. 11.8-12 wot and 13.5 idle af. Been doing it many yrs with 9.5:1 and 6lbs on 177s.
09-06-2018, 07:33 PM
Replies: 2
Views: 386
Posted By blue thunder

Detent wont have anything to do with not going...

Detent wont have anything to do with not going into reverse. Check shifter linkage first. Remove shift cable coming from helm at the shifter bracketand shift drive forward and reverse while engine...
09-06-2018, 07:22 PM
Replies: 19
Views: 1,944
Posted By blue thunder

Cool Not going to be ideal be any stretch although it...

Not going to be ideal be any stretch although it will work. Ive never found the rectangle port to be to lazy on a 454 anyway. Marine engines love free flow. That being said, I have 2 brass lined...
Showing results 1 to 25 of 500
 


 
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