98 Honda 90HP 20' Pontoon PROP ISSUES

[MuskyHunterDave]

Hello. . . .<br />I am helping this old retired guy that just bought a new to him pontoon boat. <br /><br />The engine on it is a 1998 Honda 90HP, and the pontoon boat is 20' long.<br /><br />The prop that wa son the boat when he bought it is chewed up and he wants to replace it, and use it as a back up.<br /><br />The numbers on the prop are: D3X13 25X17R <br /><br />What I need ot know, is this the right prop or close to what he should by. . . . He has not taken it out yet as the weather is still very very cold, so I am not sure what the WOT rpms is, but figured someone may know the standard for the boat / motor combination.<br /><br />I have received so much help on my evin 90hp via these forums, I told him I would post the info, and see if you guys could give him / us some guidance. I would hate for him to buy the wrong prop, as I am not sure how intune the previous owner was as the motor was pinned severly UNDER trimed, and the prop was even gouged / skuffed inside the exaust bell around the nut. . . . amazes me how people do things like that.<br /><br />Thank you in advance for any info I can get<br /><br />Have a Great Weekend<br /><br />Dave

 

[ed/il]

Re: 98 Honda 90HP 20' Pontoon PROP ISSUES

Have him get the prop repaired. When he launches see how it runs. If issues post details and some expert will reply.

 

[MajBach]

Re: 98 Honda 90HP 20' Pontoon PROP ISSUES

Well, I am no expert at reading the stamps on a prop but I am going to go out on a limb and say that's a 25" pitch prop as I don't see how that could be the diameter. If this is the case - and I hope I am corrected if I am wrong -that would seem way too coarse a prop. I ave a HOnda 90 on a 17' boat and a 21" prop is good for only light loads; it maxws out at 5400rpm. Considering how pontoon boats aren't great planers, if would imagine they would require finer pitcj props. Keep an eye out for top end rpm.

 

[mjbrueck]

Re: 98 Honda 90HP 20' Pontoon PROP ISSUES

My guess would be that it's a 13.25 x 17 prop. I'd also guess that's probably a little too high a pitch for most pontoon boats. If the prop is at all usable, I'd try one run with that prop and then decide what size replacement to buy.

 

[MuskyHunterDave]

Re: 98 Honda 90HP 20' Pontoon PROP ISSUES

Well I would GUESS 13 1/4 pith 17 " prop as well, but was hoping one of the exprts or pontoon owners with like engine would tune in on this . .. .. HMMMMM<br /><br />The prop is pretty chewed up, and I just didn't want the o'le boy to have to buy the wrong prop, and thought there would be a standard calculation for a honda 90 on a pontoon as there are a lot of them sold with that motor installed.<br /><br />Still hopeing for more info, and thanks in adance for any help . . . . .<br /><br />Dave

 

[MuskyHunterDave]

Re: 98 Honda 90HP 20' Pontoon PROP ISSUES

I think I have the size / pitch confused in my last responce, but none the less that shows just how IN NEED of professional asvice this laymen is

 

[MuskyHunterDave]

Re: 98 Honda 90HP 20' Pontoon PROP ISSUES

OOPS . . .. .Advice