Lower Engine by 4"

Highlander74 · 10 July 2009, 15:28

Hi, I am probably putting this in the wrong area, and do apologise. I have been using your site for a few years and never posted as I have always managed to navigate my way around the forum and find the answers I needed.

I have a 6m RIb with a Johnson 2 stroke 90. The issue I have is that the engine is set about 3.5" too high and ventilates when turning and accelerating fast.

The ventilation plate is currently set too high and the issue is that the settings are at the end of their travel with no more downward adjustment.

I would like to buy a new XL shaft engine but this is not an option.

Can you please advise me if fitting a fixed jack plate would solve this problem as I am not keen to trim my transom as it is fairly low as it is.

The engine currently has a trim and tilt hydraulic.

Sorry if this is too vague but it would really improve the handling if I could get this sorted.

Many Thanks in advance

Chris

Downhilldai · 10 July 2009, 16:21

Would the design of the bracket allow the motor to tilt up without fouling the top of the transom?

Highlander74 · 10 July 2009, 16:29

I am not sure as I have no idea what the brackets look like or if they are set back from the transom and how far

chewy · 10 July 2009, 16:44

Can't you just buy a longer leg and swap it over?

Highlander74 · 10 July 2009, 17:02

I did get some details of a part manufactured in the US that can be installed to lengthen by 5" I am yet to locate a similar item here.

I am keen to do anything to sort the issue at a cost that is not too expensive as funds are limited.

The engine is a 2004 Johnson 90 Saltwater edition 2 stroke

martini · 10 July 2009, 17:30

The midsection extension kits are made by http://www.baymfg.com/, cheaper than buying a new leg but still very expensive.

Trying to lower a motor by using a jack plate generally doesnt work, cables etc will foul the transom as will the steering cylinder if you have hydraulic steering.

Below is a reply to an inquiry I made with Bay MFG regarding a kit for a 225 hp Mercury:

Thank you for your interest in our products. I have attached our 613 parts sheet for your review. All parts are included that you will need. The spacer is already painted. Current retail price is $880.00. We can ship direct to you or you can go through a Mercury dealer in your area. We have shipped to many dealers in the UK. Picton Boats, EP Barras, 4 Ocean LTD, Bargain Boats, Adrian Cronk Marine, Bembridge Outboards, Trio Moulding Marine, Ribcraft, Riviera Boats, Sea & Shore, West Coast Marine, Professional Powerboats, Bursledon Outboards, Outboard Motor Specialist, Dave Crawford Marine, DB Marine, DK Fiberglass and Mobile Marine Engineers. Maybe one of these would be close to your area. Let me know if you have any other questions.
Cheryl Kirk/Sales Dept.

Downhilldai · 10 July 2009, 17:49

Quote:

Originally Posted by chewy

Can't you just buy a longer leg and swap it over?

Pete7 · 11 July 2009, 22:23

Chris, lets have some photos before you start doing anything expensive. Inside and outside would be good and another showing the cavitation plate in relation to the bottom of the hull.

Does the engine saddle sit on the transom?

Pete

Highlander74 · 12 July 2009, 16:41

Thanks Pete I will get some photos of it this week.

The saddle is right on top of the transom.