Prop pitch on 85 model 25hp mariner

[Pete Makra]

Thanks for all the advice guys. That web site was really helpful stuie63. I've run out a time as the missus and i are goin down the coast boxing day for a week of fishin. At least with the foils off I can steer the damn thing easily and hey, with her sittin up the front, we might get up on the plane a bit easier.

I'll have a look at raisin the motor and new props when I get back. Thanks to all and have a safe silly season. Catch plenty OK, Cheers

[Pete Makra]

Thanks for all the advice guys. That web site was really helpful stuie63. I've run out a time as the missus and i are goin down the coast boxing day for a week of fishin. At least with the foils off I can steer the damn thing easily and hey, with her sittin up the front, we might get up on the plane a bit easier.

I'll have a look at raisin the motor and new props when I get back. Thanks to all and have a safe silly season. Catch plenty OK, Cheers

Back from our trip down south guys. As expected, the little tinny performed like a slug again. No zip and tuff to get her up on the plane. My son & his girl stayed a couple o days with us so all 4 of us went out for a fish & "maaaaate", was it frustrating tryin to push all 4 of us around the estuary and inlet. The speed limited hire tinny's were overtaking us and we actually had trouble gettin past kayakers (man, can they paddle).

Even with just me and the missus, the only way we could get up on the plane was for my lovely to lean as far forward as possible over the bow and for me to stretch forward whilst still controlling the tiller. Even then, it took a long time for the "slug" to build up enough speed to plane.

Anyways, have since been advised that prop pitch for my old Mariner can vary from 8 up to 14, depending on what you want to do. My local marine fella happened to have a similar vintage 30hp mariner lyin around with a 9 3/4 X 9 pitch prop that he leant me to try today. Fitted it and took the "slug" down the river for a test. Pleasant surprise I must admit.

Even though I was on my own, the slug turned into a jack rabbit, jumping out o the water and planing easily. I don't have a rev counter but the motor was reving out nicely, although flat chat I only achieved 35kph with no more revs available from what my ears could tell.

Big drop from a 14 pitch to a 9 I know but there is hope that somewhere between the 2, I will get to where I am happy with. Apparently, the standard pitch for my motor is a 10 & half. Trouble is gettin a hold of some props to test with. Thanks to all for advice so far & I'm gonna try to get a hold of a 10 & a 11 pitch prop to test, as I'm thinkin this will be close to the mark.

Not withstanding the above, we did manage to catch a decent feed every day and had a ball. Cheers again