Acceptable blocking point when lifting off of trailer

[flycaster1]

I am going to lift my craft up around 6-8 inches up off my off my trailer next Spring to work on the bottom and get a fresh coat of paint on it.
 I am using poppets at the stern and wonder how far back from the bow I can get away with blocking her.
 I can get a 4x4 in between the two front bunks to jack it pretty high but the only place where there is a space between the front and rear bunks is shown with arrows.
 I would like to support her where the arrows are.
 Thanks in advance for your replies.
   

[Aquasport Commodore]

I would like for forward as it looks like it will tip forward if any weight is put in the bow.

[CLM65]

When they are set on blocks in a boatyard, there is typically a support under each rear corner and one under the keel towards the front, a little before it starts the curve up towards the bow.  I would use a 2x6 or 2x8 (minimum) under the keel the spread the load.

[seabob4]

Here's how I blocked a Mako 254 when I pulled the trailer out from under her...

[gman 82 aquasport]

Are you just raising it higher than the bunks, or are you going to pull the trailer out from under it..
I would use 6x6's about 18" long as a base and add 2x6's for the tops to actually get the lift in 1 1/2 inch increments, then I used wedges cut from 4x4's to keep it from getting wobbly. I also set the front one back about 2 feet from where the front starts to round up toward the bow.

[flycaster1]

I don't have many options here.
That's why I showed the area where there is a space between the bunks exists.
Can I block it with 6 x 6's there?

[seabob4]

On an Explorer, I would block just fwd of the actual helm...

[CLM65]

I don't have many options here.
That's why I showed the area where there is a space between the bunks exists.
Can I block it with 6 x 6's there?

Ok, I think I understand your dilemma.  Your trailer has a bunk or cradle under the forward 3-4 ft of your keel, where we have recommended that you place the support.  I would jack it up at the point you identified, and then stack your wooden supports on the forward bunk, probably right above one of the bunk supports.  Of course, I can't tell from the pics how that forward bunk is configured, so you will need to be comfortable that it can support the weight in a concentrated area.

[flycaster1]

I don't have many options here.
That's why I showed the area where there is a space between the bunks exists.
Can I block it with 6 x 6's there?

Ok, I think I understand your dilemma.  Your trailer has a bunk or cradle under the forward 3-4 ft of your keel, where we have recommended that you place the support.  I would jack it up at the point you identified, and then stack your wooden supports on the forward bunk, probably right above one of the bunk supports.  Of course, I can't tell from the pics how that forward bunk is configured, so you will need to be comfortable that it can support the weight in a concentrated area.

Maybe I will jack it above the bunks high enough to get a 4 x 6 flat across there blocked on each side of the bunks.
I don't trust the bunks to support this in a concentrated area.

[Jack Hart]

Just lifting the boat above the trailer for bottom painting is really a drill in frustration.  Taking the boat completely off the trailer is not much more work and will make repairing and painting the bottom way more hassle free and will also keep paint and solvents off your trailer.  All you need is a few blocks and two bottle jacks or some other means of lifting the bow.  It's even easier if you have access to four Brownell stands, but they're not absolutely necessary.  Jamestown Distributors has a video somewhere that outlines the whole procedure.