Reply
 
Thread Tools Search this Thread
 
Old 06 August 2014, 07:32   #1
Member
 
Country: UK - Scotland
Town: Findochty
Boat name: Harmony
Make: Jeaneau
Length: 10m +
Engine: diesel
Join Date: Aug 2013
Posts: 9
Engine revs

I don't have a spec sheet for my 1990 Mariner 100 HP two stroke. Consequently I am not sure of the maximum permissible RPM
when WOT.

It is fitted to a Humber 5.5 Atlantis and one up I reach a maximum speed of 32 MPH with a tachometer reading of 4200 RPM.

I guess the engine should rev out higher than this.

Any advice re this and suggested prop specs etc gratefully received

Phil
__________________

__________________
Chasbroon is offline   Reply With Quote
Old 06 August 2014, 09:37   #2
Member
 
kerlstone's Avatar
 
Country: UK - Scotland
Town: Ayrshire
Boat name: Deepsea
Make: Bwm 18
Length: 5m +
Engine: Mariner 100hp, +4hp
Join Date: Jun 2010
Posts: 120
Revs

Hi Phil, im wondering the same thing, i have a 100 hp 4 cyl mariner 2 st, 1989, on a 5.5m bwm rib, inside the engine cover is printed max revs, 4,750---5,250, ive only had this engine for a short time and max speed so far has been 32kts, 2 up, at about 4,200 rpm, it has a stainless 18p prop on it, so im thinking i need to drop the pitch to increase revs, is your engine the same as mine ? and what pitch prop do you have on it ?.

Gerry.
__________________

__________________
kerlstone is offline   Reply With Quote
Old 06 August 2014, 10:48   #3
Member
 
Country: UK - Scotland
Town: Findochty
Boat name: Harmony
Make: Jeaneau
Length: 10m +
Engine: diesel
Join Date: Aug 2013
Posts: 9
Yep same performance as as me, Gerry.

My RIB is afloat just now, but I will try and see what size and pitch prop I have and get back to you.

Thanks for letting me know the max revs for the engine though.

Phil
__________________
Chasbroon is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 09:16.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.