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Author Topic:   Wanted-to-Borrow: Propeller for OMC V4
Martin Harayda posted 12-26-2007 11:57 PM ET (US)   Profile for Martin Harayda   Send Email to Martin Harayda  
[Wants to borrow a propeller which will fit an] 1986 [OMC] v-4 looper v-4 gear case 13.5" or 13.75" x 22"
jeffs22outrage posted 12-27-2007 10:26 AM ET (US)     Profile for jeffs22outrage  Send Email to jeffs22outrage     
If you have a relationship with a good OMC / BRP dealer or service shop they should let you take their test props and use them for testing on your boat. Some may charge a deposit while others might not.
Tom W Clark posted 01-02-2008 08:35 PM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
What motor? Propellers are not necessarily interchangeable between brands.
L H G posted 01-02-2008 08:48 PM ET (US)     Profile for L H G    
I have found that the term "Looper" is used by OMC only, mainly for the 4 (2.0), 6 (3.0) and 8 (4.0) cylinder big bore [motors] of the 80's. (and still the same "looper" block being used for the 3.3 liter E-tecs of today.

Mercury introduced the first V-6 loop charged engine in 1976 as 2.0 liter block, but never used that term.

Tohsgib posted 01-03-2008 01:01 PM ET (US)     Profile for Tohsgib  Send Email to Tohsgib     
OMC was the first Loop charged outboard I believe with their 50hp in 1968. That engine was basically used until last year or so and still might be the block for e-tecs. Nobody ever used Looper for the most part until the big block V4. I guess it distinguished it from he cross flow V4 that was also being sold. Not sure why OMC or anyone else made cross flow engines being the loop design was far superior in efficiency. I believe just about every Yamaha and Suzuki were loop charged. Mercury eventually went that way as their older designs fell off the line. OMC for some dumb reason was still making idea why. For example...their 50 & 70(3cyl) were loopers since the 60's. When they invented the 35hp in 1976, it was a crossflow. Same with their V6's in 1976...why?
Martin Harayda posted 01-04-2008 01:13 AM ET (US)     Profile for Martin Harayda  Send Email to Martin Harayda     
my motor is a 1986 johnson 140 hp. looper w/ 13 spline shaft i have a 13"x17" 3 blade sst way to small on my montauk omc said to keep rpm @ 5500 no more im hitting 6000 and thers still more throttle i need 13 7/8" x 23" sst
Tom W Clark posted 01-04-2008 09:29 AM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
I'm not sure you will be able to turn a 23" pitch SST, nor do I think BRP makes such a prop.

You should probably try the 13-7/8" x 21" SST, part #176574, a 13-1/2" x 22" Quicksilver Lightspeed, part # QS5222H (with appropriate hub kit) or a 13-1/4" x 21" Stiletto Advantage I, part #21321

Tohsgib posted 01-04-2008 11:38 AM ET (US)     Profile for Tohsgib  Send Email to Tohsgib     
I agree with Tom but also I know your engine redlines at 6000, not 5500. I think a 20-21" would be perfect. I have a 14x20 Stilletto that would need a new hub(mine is 15spl) but would probably be a great match. New hubs cost $45.
Tohsgib posted 01-04-2008 11:40 AM ET (US)     Profile for Tohsgib  Send Email to Tohsgib     
Sorry make that a 19-21" would probably be great.
mudmanh41 posted 01-04-2008 06:27 PM ET (US)     Profile for mudmanh41  Send Email to mudmanh41     
How much for the 13.25 X 17sst? I have been looking for one.
My Johnson 90hp is crying for one.

Pat Hayes

jimh posted 01-06-2008 11:48 PM ET (US)     Profile for jimh  Send Email to jimh     
Please use Martin's thread in the PERFORMANCE discussion to discuss what propeller he ought to be trying.
Martin Harayda posted 05-03-2008 08:59 AM ET (US)     Profile for Martin Harayda  Send Email to Martin Harayda     
mudmanh41: I'll take $50.00 for the prop

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