Offshoreonly.com - Search Results
Offshoreonly.com

Go Back  Offshoreonly.com > Search Forums
Reload this Page >

Search Results

Register
FAQ
Calendar
Today's Posts
Search
Vendor Directory
Notices
 
Page 1 of 15
1
2
3
11
Last »
Search: Posts Made By: Smitty275
Showing results 1 to 25 of 371
Search took 0.01 seconds.
Forum: General Q & A
12-12-2025, 06:19 PM
Replies: 5
Views: 882
Posted By Smitty275

This is exactly what I was thinking. Sounds like...

This is exactly what I was thinking. Sounds like someone just lined up the dots, more or less, and bolted it in. I really don't think the cams are the problem. I think tuning is needed and maybe...
Forum: General Q & A
12-12-2025, 05:39 PM
Replies: 62
Views: 4,554
Posted By Smitty275

Mine was put together with a regular rubber...

Mine was put together with a regular rubber gasket that goes between the flange and the transom. They seal up great. Boat is 38yrs old and transom is as dry as the day it was built. I'd find the...
Forum: Do It Yourself, Boating on a Budget
12-01-2025, 03:37 PM
Replies: 0
Views: 579
Posted By Smitty275

Cam Identification

Cam numbers are 931246 6209. Can anyone provide specs? Look like Mark IV cams with no step on them. Any assistance greatly appreciated. I've tried searching the net for these numbers to no avail.
Forum: General Q & A
11-20-2025, 03:37 PM
Replies: 45
Views: 2,870
Posted By Smitty275

Airplane engines are over engineered a lot...

Airplane engines are over engineered a lot compared to our transplanted automotive marine engines. Airplane engines, in most instances, dont turn near the RPM either.
Forum: General Q & A
11-20-2025, 10:51 AM
Replies: 45
Views: 2,870
Posted By Smitty275

I would not shim the stud out from the head....

I would not shim the stud out from the head. Course threads are not as strong as fine threads. What you currently have on the top will be fine. Especially if your using posi locks with the set screw...
Forum: General Q & A
11-18-2025, 08:29 PM
Replies: 45
Views: 2,870
Posted By Smitty275

Technically, you should have the diameter of the...

Technically, you should have the diameter of the threads as your engagement length if you were at max loading of the stud. Thus a 7/16 -20 stud would have 10 threads of engagement. BUT, I seriously...
Forum: General Q & A
11-18-2025, 07:16 PM
Replies: 45
Views: 2,870
Posted By Smitty275

Guide plates will only make a difference on side...

Guide plates will only make a difference on side to side location. They won't change intake side/exhaust roller pattern side location.
Forum: General Q & A
11-18-2025, 06:47 PM
Replies: 8
Views: 799
Posted By Smitty275

Could a person just change throttle body and find...

Could a person just change throttle body and find the correct ECM to turn it into a 430hp engine?

Or would it be easier to buy a complete aftermarket system and start from scratch?
Forum: General Q & A
11-18-2025, 06:41 PM
Replies: 45
Views: 2,870
Posted By Smitty275

Scott Foxwell from Straub Technologies gives the...

Scott Foxwell from Straub Technologies gives the best set up in this YouTube video:
https://youtu.be/o5is9BsH5OU?si=_GZd7p1zX4HWeuKI

As to where the sweep cones out on the valve, be it centered...
Forum: General Q & A
11-10-2025, 06:49 PM
Replies: 5
Views: 569
Posted By Smitty275

If it's going to be below freezing, make sure...

If it's going to be below freezing, make sure that all the water is drained from the block, oil heat exchanger, water pump, exhaust manifolds, etc. or filled with antifreeze.
Forum: General Q & A
11-10-2025, 06:30 PM
Replies: 14
Views: 1,637
Posted By Smitty275

You'll love your Willy's carb. My dyno guy uses...

You'll love your Willy's carb. My dyno guy uses them exclusively. Quite a few of my customers have them on their rides.
.
Forum: Do It Yourself, Boating on a Budget
10-29-2025, 04:35 PM
Replies: 23
Views: 2,067
Posted By Smitty275

"IF" You were drawing air, it'd also be blowing...

"IF" You were drawing air, it'd also be blowing out that same rupture when you hold the muffs tight. If that impeller has been in for 6yrs it's shot. They take a set when they sit for a while. So if...
Forum: Do It Yourself, Boating on a Budget
10-28-2025, 07:04 PM
Replies: 2
Views: 788
Posted By Smitty275

Ignition Modification or Replacement

I'm swapping on a pair of fast burn oval port heads with 100cc chambers (GM19256821) onto an '87 Mercruiser 454 that's probably .030 over. They will ported and flow very well for an iron oval port....
Forum: Do It Yourself, Boating on a Budget
10-28-2025, 06:32 PM
Replies: 23
Views: 2,067
Posted By Smitty275

If the impellor is in good shape, check for...

If the impellor is in good shape, check for blockages. First, I'd pull the hose off the back of the impeller housing and make sure water is getting through the transom and to the impellor housing....
Forum: General Q & A
09-07-2025, 04:59 PM
Replies: 19
Views: 1,237
Posted By Smitty275

Thanks for the update. Nice to know the solution...

Thanks for the update. Nice to know the solution for future reference.
Forum: Do It Yourself, Boating on a Budget
09-05-2025, 04:29 PM
Replies: 8
Views: 1,022
Posted By Smitty275

I soaked the heads in simple green and let soak....

I soaked the heads in simple green and let soak. Then pressure washed them. Put them into an electrolysis tank and got the carbon and some minor rust off. Then pressure washed again. I'd say they're...
Forum: General Q & A
09-05-2025, 01:42 PM
Replies: 19
Views: 1,237
Posted By Smitty275

Have you put a new o-ring on the needle body? In...

Have you put a new o-ring on the needle body? In my experience that is the #1 cause of flooding like your experiencing. Also you MUST lubricate that o-ring when screwing the body into the fuel bowl....
Forum: General Q & A
09-05-2025, 01:14 PM
Replies: 7
Views: 1,140
Posted By Smitty275

Just out of curiosity, how well would the...

Just out of curiosity, how well would the Duplicolor paint have held up? n
Forum: Do It Yourself, Boating on a Budget
09-05-2025, 01:02 PM
Replies: 8
Views: 1,022
Posted By Smitty275

Engine Paint

What are you guys using to paint iron blocks and heads for I/Os? Something that will hold up to the constant humidity of being stored in a slip.
Forum: Prop Talk
09-02-2025, 03:03 PM
Replies: 6
Views: 1,104
Posted By Smitty275

I've never seen a prop hub that went into a round...

I've never seen a prop hub that went into a round bore and was retained by 4 pcs of roughly 3/16 diameter rubber. Is this something from between the old fashioned solid rubber hub/ with metal center...
Forum: Prop Talk
09-02-2025, 11:55 AM
Replies: 6
Views: 1,104
Posted By Smitty275

Explain this prop hub please

This is the hub of a Mirage Plus I looked at today. It's for sale locally. I'm no prop expert, but aside from the hub not being pushed in all the way, it just doesn't look right to me. Or is it ok? ...
Forum: General Q & A
08-07-2025, 08:08 PM
Replies: 6
Views: 928
Posted By Smitty275

Here are pics of the heads being discussed. I...

Here are pics of the heads being discussed. I think they'll be a worthwhile winter project to replace my peanut ports. I'll put them on the flow bench as is and document the progress. Not sure if...
Forum: General Q & A
08-07-2025, 12:24 AM
Replies: 6
Views: 928
Posted By Smitty275

Cylinder Head ID

I've came across a set of BBC cylinder heads PN 19256821. They currently have 2.06 intake valves and 1.75 exhaust valves in them. (measured with a scale so might not be exact.) Small oval port with...
Forum: General Q & A
03-26-2025, 04:22 PM
Replies: 1
Views: 728
Posted By Smitty275

8.1 Head Gaskets

Can someone tell me what the correct FelPro head gasket PN is for an 8.1 Mercruiser? (4.25 bore x 4.375 stroke)

Thank you,
Forum: Do It Yourself, Boating on a Budget
02-02-2025, 04:26 PM
Replies: 5
Views: 1,124
Posted By Smitty275

Thank you.

Thank you.
Showing results 1 to 25 of 371
 
Page 1 of 15
1
2
3
11
Last »


 
Forum Jump

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.