Shaft Length...

nofearengineer · 07-23-09, 09:48 AM

Hey guys,

I am looking at a decent deal on an Opti 175 to replace my Opti 115.

My question is, my transom is 22" high. Opti's come in 20" or 25" shaft length. The motor I'm looking at is a 25" model. If I buy it, I will certainly put it on a jackplate. I know there would be more drag with a longer shaft and no jack plate.

Would it be better to jack "up" a 25" shaft motor or jack "down" a 20" motor? Or no real difference other than the extra weight of a 25" motor (slight).

If it makes any difference whatsoever, remember my hull is a modified V with no real "pad".

zooker · 07-23-09, 12:52 PM

20" standard bass boat shaft.. 25 are for off shore use..

zooker

nofearengineer · 07-23-09, 01:38 PM

I understand that, Zook...but I'm thinking if I can get a steal on a 25" motor, it should still work for me with a jackplate on a 22" transom, right? Any problems I'm not seeing?

zooker · 07-23-09, 04:19 PM

the shaft measure from the power head to the lower unit..if ya went with a 25" you would have to get a 12" jack plate...

zooker

nofearengineer · 07-23-09, 04:36 PM

My 115 is a 20" motor, with no jack plate. Are you saying I need 7" of jack plate with what I've got now? I'm confuzzled.

I always thought you were supposed to get the shaft that was closest to the height of your transom, and adjust it up or down with a jack plate.

1FASTLASER · 07-24-09, 07:06 AM

The 25" will work but you will have to have a plate.....depends on what plate will sevre ya best depending on your rig......by the way what boat do you have.....I can give ya a good recommend on which plate if I knew exactly what boat we are referring to.

nofearengineer · 07-24-09, 10:28 AM

I have a Tracker Avalanche...tin boat in fiberglass disguise.

07-23-09, 09:48 AM	#1
nofearengineer BassFishin.Com Premier Elite Join Date: Mar 2009 Location: Southwest IN Posts: 5,630	Shaft Length... Hey guys, I am looking at a decent deal on an Opti 175 to replace my Opti 115. My question is, my transom is 22" high. Opti's come in 20" or 25" shaft length. The motor I'm looking at is a 25" model. If I buy it, I will certainly put it on a jackplate. I know there would be more drag with a longer shaft and no jack plate. Would it be better to jack "up" a 25" shaft motor or jack "down" a 20" motor? Or no real difference other than the extra weight of a 25" motor (slight). If it makes any difference whatsoever, remember my hull is a modified V with no real "pad". __________________ Many men go fishing all of their lives without knowing it is not fish they are after.

07-23-09, 12:52 PM	#2
zooker BassFishin.Com Premier Elite Join Date: Jan 2004 Location: denton nc Posts: 13,441	20" standard bass boat shaft.. 25 are for off shore use.. zooker __________________ the godfather.. aml in remission since 7-20-09

07-23-09, 01:38 PM	#3
nofearengineer BassFishin.Com Premier Elite Join Date: Mar 2009 Location: Southwest IN Posts: 5,630	I understand that, Zook...but I'm thinking if I can get a steal on a 25" motor, it should still work for me with a jackplate on a 22" transom, right? Any problems I'm not seeing? __________________ Many men go fishing all of their lives without knowing it is not fish they are after.

07-23-09, 04:19 PM	#4
zooker BassFishin.Com Premier Elite Join Date: Jan 2004 Location: denton nc Posts: 13,441	the shaft measure from the power head to the lower unit..if ya went with a 25" you would have to get a 12" jack plate... zooker __________________ the godfather.. aml in remission since 7-20-09

07-23-09, 04:36 PM	#5
nofearengineer BassFishin.Com Premier Elite Join Date: Mar 2009 Location: Southwest IN Posts: 5,630	My 115 is a 20" motor, with no jack plate. Are you saying I need 7" of jack plate with what I've got now? I'm confuzzled. I always thought you were supposed to get the shaft that was closest to the height of your transom, and adjust it up or down with a jack plate. __________________ Many men go fishing all of their lives without knowing it is not fish they are after.

07-24-09, 07:06 AM	#6
1FASTLASER BassFishin.Com Super Veteran Join Date: Aug 2005 Location: crossett,arkansas Posts: 2,777	The 25" will work but you will have to have a plate.....depends on what plate will sevre ya best depending on your rig......by the way what boat do you have.....I can give ya a good recommend on which plate if I knew exactly what boat we are referring to. __________________ Laser's rule with Merc's doing the pushing..........KEEP THE WETSIDE DOWN AND THE DRY SIDE UP!!!!!!

07-24-09, 10:28 AM	#7
nofearengineer BassFishin.Com Premier Elite Join Date: Mar 2009 Location: Southwest IN Posts: 5,630	I have a Tracker Avalanche...tin boat in fiberglass disguise. __________________ Many men go fishing all of their lives without knowing it is not fish they are after.

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