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Date Posted: - Thursday - 05/12/05 - 6:25am
Author: Joe
Author Host/IP: pcp0010813548pcs.desoto01.md.comcast.net / 68.34.104.23
Subject: prop size for mariner 36

I have a Tayana Mariner 36 1978 thats out of the water for bottom painting. While cleaning the prop I noticed on the back that it is an 18x10. I would think this is way oversized and pitched for a 36 with a perkins 4-108. I am not sure which transmission were standard with this set up, but it is the original engine and tranny. I do have a problem with not getting over 2400 rpm and some serious prop walk and think this could be the problem. Does any one know what the standard tranny was... and what prop it is rated for? thanks
Joe

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Replies:

[> prop in an M31 -- Randall, - Thursday - 05/12/05 - 1:56pm (64-161-221-132.opentable.com/64.161.221.132)

I have the same engine in an M31. I have a 1:1 tranny and a 12 x 6 three blade prop. Lotta folks on this board seem to have 2:1 in which case the 13 x 8 prop seems to work very well. (I have had a 13 x 8 on mine but could only get low rpms with it. Lotsa speed, but low rpms.)

I don't know what tranny to expect in a 36.

RR

[Edit]
[> [> Re: prop in an M31 -- Joe, - Wednesday - 05/25/05 - 8:31am (pcp0010813548pcs.desoto01.md.comcast.net/68.34.104.23)

Thanks for the help.. I think I have a 2:1 but need to find out for sure..I was thinking the 13x8 sounded more reasonable..but wanted to make sure it was ok with the 36. On the tayana site it looked like all the tayana37's had the 18x10 so I dont know if the yard was just putting them on everything they were making at that time or what.
Joe

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