?? motor installation

[93bronco]

went to the boat show this weekend and looked at everything and was suprised to see that 95% of all new ob motors were installed sitting on transom molding and not being flush with the hull, resulting in a 1/16 to 1/8 gap depending on thickness of molding. isnt this bad for the hulls not to have the motors flush and also bad for the motors themselves <excessive vibration>. has this become an industry standard to install the outboards in this fashion. the only boat i saw with the ob flush with hull was a pursuit.

 

[G DANE]

Re: ?? motor installation

2K Boat<br /><br />Do I get it right: upper part of motor bracket rests on moulded edge ?? If I bought a boat with motor mounted like that, i´d be heading right back to manufacturer to get it corrected. Just installes one last month where I had to grind 1/8 away and paint to get bracket flush, moulded edge was more than 2 1/4 " thick.

 

[93bronco]

Re: ?? motor installation

yep you got it right. scout, seapro, seafox, seahunt, keywest and of course bayliner. its probably one of those overlooked things by a new boat buyer. i know when i installed the 120 j/e on my trophy it was going to be the same way, so i installed a 1/4 aluminum plate to keep it flush and off the molding, also to assist in the added weight of the looper motor. i was amazed at how many were like that. i attribited mine due to it being high on the transom to keep cavitation plate even with bottom of boat. and the boat came with a 90 force. seems this would cause some type of problem. 20K + for a boat and they install the motor that way. im curious. some of the transom moldings were being distorted.

 

[Arrowglass]

Re: ?? motor installation

this is a misconception on the motor installation. The motor is not installed on the trim per say, but rather installed using the mounting bolts. If the engine mounting plate actually was touching the glass, then the plate is acting like a compression post, pushing downward pressure onto the transom. by using the mounting bolts, you can actually adjust the height of the motor for acurate performance, while evening out the load across the transom. If you look at some brands, the "hook" of the mounting plate can be 2" above the transom cap without any adverse effects.

 

[ob]

Re: ?? motor installation

Arrowglas,I think they are refering to the transom bracket of motor being installed with its "vertical" surface over the boats transom trim instead of being completely flush to the surface.This leaves a gap the thickness of the trim material starting at the top and tapering down to where lower transom bolts pull it to the boat surface.Not good.

 

[Arrowglass]

Re: ?? motor installation

re read post, gottcha. I was mistaken. Even with this, if the trim is a vacuformed part and say 1/16", it will not be a concern. By the time you seal you engine mount bolts, you would take that out of the equation. Now if it alum, and thicker, problem. The other thing to keep in mind is, check your transom. I'd be surprised if it 100% flat, seeing you are dealing with a moldable product. If that part is popped from the mold "green", it can take on any shape.<br /><br />Just a thought

 

[miloman]

Re: ?? motor installation

most motors on boat show demos are not rigged for running. IN fact in most cases the motor is just hung on and secured. When you purchase teh boat and motor they will rig it to be flush