Need ideas to stop porpoising?

[Bushwacker]

. . .my suggetion on a bow raising prop and raising the motor was expensive . .

You need a STERN lifting prop, not BOW lifting (they're used on bass boats to get more speed)! I would think Honda would make stern lifting props to compensate for the weight of their 4-stroke engines. Dealer should be willing to raise motor for free (it's a very simple job) if he installed it, to help mitigate the problem you're having. Might be worth trying to find a Honda rep with more technical savvy!

[gss036]

I meant to say stern lifting prop. Yeh, I would have thought they would raise the motor for me. I will wait a few days to see he calls me again before I cal him or the salesman and chew on him, but don't think he is into anything but selling.

[htillman]

If it is a matter of raising the motor to "tweak" it that is the dealers responsibility and obilgation. If he does not think so, then so be it. You can raise the motor if you have a floor jack yourself to check different configurations. My motor installations insist on making sure the motor is at the right height and is willing to move it as much as I think? is necessary. Put pressure on the dealer to finish his job.

[gofastsandman]

PLEASE TRY A STERN LIFTING PROP AND GET THE CAV PLATE RIGHT. Fr.Frank and Bigshrimpin are the driving force for my doing so. It`s as if little elves redesigned my hull.
No company wants you buying other cos.stuff. When they go racing they use whatever is best. Period. I had a lot of time to look and got a very nice Mirage + for 125! The Rev 4 is an even better choice imo after Bushwacker's research.

[gss036]

I called the salesman and told him again of my concerns. He had never heard of a stern lifting type prop and insisted that the motor cavatition plate should be 1 1/2 inches below the center lines as per specs( Honda?). Anyway I went out and checked it and it is even with "V" center. Tom Clark in Seattle was going to check to see what prop the Honda number might cross over to and what he has on hand that might work. Looks kind of like I will have to buy a used prop to try. Tom thought he had a coupl layng around his shop.

[Fr. Frank]

I called the salesman and told him again of my concerns. He had never heard of a stern lifting type prop...

If he said that, he's either:

• a completely ignorant newcomer to boating; or
• he's a complete idiot; or
• he's lying through his teeth.

There are no other plausible explanations for making such a statement.

[gofastsandman]

I`m in sales. Your "salesman" is a tool!

Picture this in your mind. Your cav plate is well below the keel. What really happens when you trim up? The plate digs in like a shovel and pulls the stern down. This will happen even if they are level. That`s why it needs to be higher. This is true of ALL motors. PERIOD.

This is also killing performance and mpg. Not to mention the boats running attitude. Your`s too.

Fr. Frank has forgotten more about props than most "pros" will ever know. He tested props for a living. Bushwacker was an engineer at Pratt+Whitney. Tool or rocket scientists? I`d tell the tool to come by CSC for some edumacatin!

[gofastsandman]

Forgot. Mirage+ and Rev 4 prps have interchangeable hubs for different brands of motors. I have a Rude w/ a Merc prop.

[gss036]

I opened my e-mail this AM and surprise, I have an e-mail from Capt Sante, they want me to bring him the boat down and they will raise the engine. I did go out and check the boat yesterday w/a straight edge. The cavatition plate is exactly even with the flat portion of the "V" bottom of the boat. The Honda motor has the big cavatition plate and directly above it is 2 smaller plates. I am told thses are splash guards(?). I was thinking 1 or 2 holes and bring it up to about 1 1/2 inches higher. Ideas, please?
How much should I have the engine raisied by, 1 hole or 2 holes??
This is a single counter rotating engine, so I don't think that would make any difference. I am not really that knowledgable about props. The prop is installed on a spline with a new etc and carter key.
I sent Tom Clark and e-mail to see if he has come up with anything. The only numbers on the prop is S 3 14 1/4 17 L and of course the Honda name.

[gss036]

I took pictures of the transom, now I just need to figure out how to post them here.
I have been trying to figure it out and I am not having any success. Can I e-Mail them to someone and they can maybe post.