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Search: Posts Made By: Steve H
Showing results 1 to 25 of 500
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Forum: General Q & A
06-01-2025, 12:51 PM
Replies: 26
Views: 2,299
Posted By Steve H

Last night I readjusted valves (again!). Used 1/4...

Last night I readjusted valves (again!). Used 1/4 turn past zero lash instead of 1/2 turn. Engine runs better, but still not quite right. Next step is double check timing ensuring that
actual...
Forum: General Q & A
06-01-2025, 12:42 PM
Replies: 26
Views: 2,299
Posted By Steve H

I'm using GM small cap HEI. I have replaced p/u...

I'm using GM small cap HEI. I have replaced p/u and module with OE GM parts, drive gear looks new.

I have pulled plugs, #8 and #5 are slightly brighter than the rest. No signs of exhaust leaks
...
Forum: General Q & A
05-30-2025, 04:39 PM
Replies: 26
Views: 2,299
Posted By Steve H

No, this engine has never ran well. Running...

No, this engine has never ran well. Running Holley HP ECUs. I forgot to mention above that I did swap ECUs with no change in port engine.
Forum: General Q & A
05-30-2025, 02:09 PM
Replies: 26
Views: 2,299
Posted By Steve H

Sierra Marine Wires Both Engines. They were...

Sierra Marine Wires Both Engines. They were installed new with engines



I think it is a random missfire @ idle, then turns into a hard miss when getting on plane, then runs perfect over 1500...
Forum: General Q & A
05-30-2025, 09:40 AM
Replies: 26
Views: 2,299
Posted By Steve H

Well, swapping cap, rotor, and wires from other...

Well, swapping cap, rotor, and wires from other engine did not change anything.

Not sure where to go from here. I'm seriously considering installing a set of lifters. I don't know what else to...
Forum: General Q & A
05-27-2025, 09:57 PM
Replies: 26
Views: 2,299
Posted By Steve H

It has great oil pressure, and wires, cap, and...

It has great oil pressure, and wires, cap, and rotor are Sierra Marine. I've had great luck with them over the years. I have not tried the wires from the other engine. I will do that!
Forum: General Q & A
05-27-2025, 05:39 PM
Replies: 26
Views: 2,299
Posted By Steve H

I suspect I'm getting a miss from each bank—at...

I suspect I'm getting a miss from each bank—at least, that's how it feels. It's hard to test by pulling plug wires because the exhaust exits below the waterline at idle, causing a lot of bubbles to...
Forum: General Q & A
05-27-2025, 04:38 PM
Replies: 26
Views: 2,299
Posted By Steve H

Rough Running ZZ502

OSO!!

I'm struggling and looking for suggestions to get the port engine in my 42’ Sportfish to run smoothly below 1500 RPM, and at idle.

The boat is powered by a pair of ZZ502 short-blocks...
Forum: General Q & A
05-10-2025, 09:49 AM
Replies: 10
Views: 1,366
Posted By Steve H

I converted two carbureted 502s to used Merc MPI...

I converted two carbureted 502s to used Merc MPI systems several years ago. After a couple of frustrating years dealing with the MPI, I switched to Holley HP TBI.

Since then, I’ve logged over...
Forum: General Q & A
04-28-2025, 04:05 PM
Replies: 31
Views: 3,112
Posted By Steve H

If you are triggering the relays only, any in...

If you are triggering the relays only, any in line diode rated for .5 amp or so would be plenty.
Forum: General Q & A
04-21-2025, 03:53 PM
Replies: 2
Views: 846
Posted By Steve H

You need one of these: ...

You need one of these:
https://www.innovatemotorsports.com/heat-sink-bung-extender-hbx-1.html?srsltid=AfmBOooxvLq-TwmfYcbStbe6YJNDXL99PrXDmZ3kk6fA1iqzT4AkotZQ

They must be clocked correctly. You...
Forum: Restorations & Upgrades
04-03-2025, 04:45 PM
Replies: 15
Views: 45,199
Posted By Steve H

I have lots of dead o2 sensors over the years....

I have lots of dead o2 sensors over the years. Zero issues for over 100 hours after I installed bung extender found here:

...
Forum: General Q & A
03-20-2025, 12:18 PM
Replies: 10
Views: 8,751
Posted By Steve H

Ken Riggs [email protected]

Ken Riggs

[email protected]
Forum: General Q & A
03-07-2025, 01:30 PM
Replies: 24
Views: 9,670
Posted By Steve H

I have always used metal gaskets from auto parts...

I have always used metal gaskets from auto parts store for my 42' Sportfish with 502's. 100 plus hours per year, and have never had a failure!
Forum: Do It Yourself, Boating on a Budget
02-14-2025, 01:34 PM
Replies: 9
Views: 1,945
Posted By Steve H

I've done this task more than a few times over...

I've done this task more than a few times over the years.

One thing I can add to the above is the careful use of a heat gun. Just be careful that you don't get the gelcoat too hot
and be patient....
Forum: General Boating Discussion
01-15-2025, 06:56 PM
Replies: 42
Views: 10,203
Posted By Steve H

42 Sport Fish, 15,000 lbs light to 18,000 heavy,...

42 Sport Fish, 15,000 lbs light to 18,000 heavy, with over 2,000 hours on ASDs. Seals and zincs only.
Forum: General Q & A
12-30-2024, 01:24 PM
Replies: 18
Views: 3,229
Posted By Steve H

As said above, turn the idle back to 700 or so...

As said above, turn the idle back to 700 or so RPM's to avoid any chance of water reversion.

Most boats I have owned over the years have had mufflers inserted inline in exhaust hose, or a baffled...
Forum: Do It Yourself, Boating on a Budget
12-11-2024, 12:14 PM
Replies: 13
Views: 2,327
Posted By Steve H

https://www.thehulltruth.com/boating-forum/1207674...

https://www.thehulltruth.com/boating-forum/1207674-mercruiser-crank-mounted-seawater-pump.html

Not my boat, but the above thread covers the subject well.
Forum: Do It Yourself, Boating on a Budget
12-07-2024, 02:15 PM
Replies: 13
Views: 2,327
Posted By Steve H

Zoom in engine on left, you can see all...

Zoom in engine on left, you can see all accessories mounted up. Yes, I did source my own 100A Marine alternator. If your existing distrutor is a small cap HEI it will work
just fine for your carb...
Forum: Do It Yourself, Boating on a Budget
12-06-2024, 12:07 PM
Replies: 13
Views: 2,327
Posted By Steve H

I recently converted my inboard from V-Belts to...

I recently converted my inboard from V-Belts to serpentine using these kits. Used crank mounted raw waterpump.

...
Forum: General Q & A
11-05-2024, 01:03 PM
Replies: 13
Views: 2,999
Posted By Steve H

I have had issues in the past with sensors...

I have had issues in the past with sensors getting wet.
After installing the Innovate HBX-1 bung adapter, I have
60 hours on the clock with no problems!

Steve
Forum: General Q & A
08-23-2024, 12:57 PM
Replies: 14
Views: 1,614
Posted By Steve H

The front of the intake plenum, and spark...

The front of the intake plenum, and spark arrestor are both seriously rubbing on the fiberglass drip rail. That issue alone would cause even a smooth running engine to
sound like it is vibrating. I...
Forum: General Q & A
08-21-2024, 04:14 PM
Replies: 4
Views: 504
Posted By Steve H

OEM unit is close to 400 bucks. The one you have...

OEM unit is close to 400 bucks. The one you have is around $100.

Some Chinese stuff is terrible, other Chinese stuff, not that bad.

It's a decision you have to make!
Forum: General Q & A
08-12-2024, 12:51 PM
Replies: 9
Views: 1,219
Posted By Steve H

I don't know enough about it to explain it in...

I don't know enough about it to explain it in detail. Just using past personal experiance with reversion issues over the years.

Pour a cup of coffee and search this site for "stainless marine...
Forum: General Q & A
08-08-2024, 09:48 AM
Replies: 9
Views: 1,219
Posted By Steve H

Most likely reversion, which could be caused by a...

Most likely reversion, which could be caused by a leaky riser connection. Be sure the gasket is in good shape, along with using some good hi temp gasket sealer.
Showing results 1 to 25 of 500
 
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