Another engine height thread

Bigtalljv · 23 January 2014, 02:47

Seems like a popular question recently. I mounted my engine on the top hole and the cav plate is sitting 1 1/2" below. The only other boat like mine that I have seen with a single is the 733 in Thailand now. Owned by YNP (did I see the name Yuri somewhere) used to be up in Vancouver BC with a single 300hp etec. They had it in the next hole down so up an inch higher than mine. Any thoughts? Do I go up one hole or two?

Thanks
Jason

nugent · 23 January 2014, 05:11

Quote:

Originally Posted by Bigtalljv

Seems like a popular question recently. I mounted my engine on the top hole and the cav plate is sitting 1 1/2" below. The only other boat like mine that I have seen with a single is the 733 in Thailand now. Owned by YNP (did I see the name Yuri somewhere) used to be up in Vancouver BC with a single 300hp etec. They had it in the next hole down so up an inch higher than mine. Any thoughts? Do I go up one hole or two?

Thanks
Jason

Way to low for sure , at th e least should be in line with hull anything above 100 hp slightly above mine is set 1" 1/2 above hull line and is running great now,,,

Bigtalljv · 23 January 2014, 05:30

Well it's a 250 so I guess I should think about going up at least two holes.

teamplonker · 25 January 2014, 09:21

Quote:

Originally Posted by Bigtalljv

Seems like a popular question recently. I mounted my engine on the top hole and the cav plate is sitting 1 1/2" below. The only other boat like mine that I have seen with a single is the 733 in Thailand now. Owned by YNP (did I see the name Yuri somewhere) used to be up in Vancouver BC with a single 300hp etec. They had it in the next hole down so up an inch higher than mine. Any thoughts? Do I go up one hole or two?

Thanks
Jason

I had performance problems with mine when it was low, all sorted when I moved it up.

Mine is inline with cav plate but others I have seen are slightly higher.
One thing I found is you need to play around with ballast up front or console position after moving outboard.

Bigtalljv · 25 January 2014, 14:57

my boat has never been in the water as an outboard and the console position is fixed, but I can play with ballast if I ever get into the water. I'm just looking for the best guess to get started. Thanks for the suggestions. I think I'll go up two holes and see what that gets me.

steco1958 · 25 January 2014, 15:01

Quote:

Originally Posted by Bigtalljv

my boat has never been in the water as an outboard and the console position is fixed, but I can play with ballast if I ever get into the water. I'm just looking for the best guess to get started. Thanks for the suggestions. I think I'll go up two holes and see what that gets me.

Surely the best thing for you to do is get the boat in the water to see how it handles prior to making any changes. Or am I missing something ?

Steve

Bigtalljv · 25 January 2014, 17:19

Well an 1 1/2" low should not be a good location so I'm just looking for a good starting place and trying to get the best guess possible. I know it's not right as is so running it isn't going to tell me anything new.

Bigtalljv · 26 January 2014, 23:04

This is up two holes. I think this should be a good starting point.

Jason

nugent · 27 January 2014, 04:56

Quote:

Originally Posted by Bigtalljv

This is up two holes. I think this should be a good starting point.

Jason

Trimmed out level hat will give you approx 2". Blow the water line

nugent · 27 January 2014, 04:57

[QUOTE="nugent;596591"]

Trimmed out level that is still to low. I think you have an xl on a l transom there ,, huge add in section on the leg

Chris · 27 January 2014, 06:44

Yep that's very low. Needs to move up at least 2 if not 3 inches.... If that engine is too long for the transom as Nugent suggests then you will need to look at a jack plate to sort out the issue or trading in the engine for a shorter one.

Bigtalljv · 27 January 2014, 16:18

hmm, the old specs that I have seen and the little bit of info I have been able to gather says the 30" leg is the correct motor. I have sent off a few emails trying to get some clarification but it's a challenge finding any first hand info. The boat is spec'd to use 25" motors with twins. I have only seen two or three others with a single on it.

Jason

Bigtalljv · 27 January 2014, 20:44

Ok. With the engine trimmed it becomes a bit more apparent. That's an inch low almost exactly. If course my mount looks like this now. I guess I really needed a 27" leg

RIB_850 · 14 February 2014, 15:41

May be it could help.
Try to have the cavitate plate just over the waterline at WOT or cruise well trimmed, and becarefull with water pressure (If too high the water could flow badly through the intake point above the cavitate plate....).
Do it step by step if raising in holes.
And much depends on the load in the boat (fuel, persons, load....) so be carefull.

RIB_850 · 14 February 2014, 15:48

looking at your pictures I think you can raise it up perfectly. I should raise up first one hole, but probably could raise up the two holes left.
If you can hold the engine firmly, one way to do it easily is moving the rear height of the trolley with the front jockey wheel.

Bigtalljv · 14 February 2014, 16:17

thanks, I think i'll go up one more before I put it in the water. I have an auto engine hoist that I use so it's just a 15 minute job.

RIB_850 · 14 February 2014, 17:29

look at Propgods.com > HOME
the best