Motor swap

Doug158

Cadet
Joined
Aug 22, 2007
Messages
13
I am taking a older Merc 90hp off my Pontoon and replacing it with a newer 90hp Evinrude what is the right hight to hang the motor on the transom
 

bassboy1

Lieutenant Commander
Joined
Jun 23, 2006
Messages
1,884
Re: Motor swap

How was the old one? I don't know the rule of thumb for toons, but I would say, measure where your cavitation plate is on the merc, and mount the 'rude so the cav plate is at the same height.
 

Doug158

Cadet
Joined
Aug 22, 2007
Messages
13
Re: Motor swap

when I took the Merc off I took it to a Machine shop and had a solid stainless Transom put in as well as a plate welded on the end of the right toon to remount my Deptfinder and to install the intake screen for my fresh water washdown so I am starting with a blank slate I am hoping someone knows a good way to start off like should the prop be a foot below the bottom of the toons or 6 inches or even with the bottom of the toon
 

Doug158

Cadet
Joined
Aug 22, 2007
Messages
13
Re: Motor swap

I go with BassBoy, Put it the same as the old Merc.

That might work if I knew the hight the merc was but as I said I have a new transom and a totally different motor so I am hoping to get some ideas of where to start before I end up with 12 new holes in my Transom :confused:
 

ThumbPkr

Petty Officer 1st Class
Joined
Aug 17, 2007
Messages
371
Re: Motor swap

I would suggest that the simplest way to get that info at this point would be to measure other pontoon boats with similar setups since you have no reference points to start with anymore.
Maybe the quickest way might be a dealers lot.If you visit the mfgs. website you may get a clue there,also any pics you may have taken with your old setup installed might be helpful.Ron G
 

Doug158

Cadet
Joined
Aug 22, 2007
Messages
13
Re: Motor swap

I take plenty of pic's of the fish we catch and a couple of the Toon but it is always in the water have gone around to a couple of boat places but they either dont have engines yet or they are smaller motors one of the Dealers told me about this site said if anyone would know they would be on here so I took a shot and Joined
 

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