1979 MCM 260 Impeller Kit Part #'s and Timing Question

[iaboat]

Hello, I'm planning to replace the impeller in my 79 mercruiser 260 with a "pre-alpha" MC-1 drive. I took the boat out the past weekend and temps went up to 190 degrees. I'm going to replace the thermostat while I'm at it since this boat...

[thumpr82]

I know it’s probably been answered but I just can’t seem to find it exactly to what I have. I am trying to set the timing on a 2000 5.7 Volvo Penta with tbi and est distributor. I have the shunt but when I plug it up to the back of the distributor,...

[snsrider717]

Thank you in advance for any help you can provide with this incredibly frustrating issue.

Boat: 1986 Sea Ray 21' Cuddy Cruiser
Engine: Original 5.7L 260 HP Mercruiser with Alpha 1 Gen 1

Problem: Engine runs perfectly...

[pdl2193]

I'm new here an this is my first post. I have a 50 hp Johnson an I had to replace the points an condensers. But now I can not get the boat to fire at all. It was running on just on top cylinder so we went ahead an replaced the spark plugs an wires, condensers...

[sregdorr]

Hello All! Long time site stalker, first time poster.
I recently purchased a 1990 Nitro Tracker with a Johnson 90hp (TJ90TLESB). The boat had been sitting a while so I rebuilt the carbs which made a world of difference. I checked the timing with...

[WillyNell]

Hi all,
I have heard that you can swap the carbs from a 70 to the 40 with just a bolt on process and was just wondering what year of engine i would have to get the carbs from. Also if and what rejetting will be required and what i should then advance...

[TheGeek]

Hello, I have a 1973 850 with serial number: 3744577. I am currently in the process of replacing a stretched timing belt. I have the old one off as well as the pulley and am realigning the motor with the distributor. The timing decal has been completely...

[thunderbolt!]

Hello everybody,

First I have to apologize for my not so perfect English. I'm from Germany, but I will do my very best

I own a Mercury 500 Thunderbolt from 1977 (serial# 9136259) Originally a manual start model, it was upgraded...

[bobcox]

Hi Folks,

I'm working on a Formula 233 from 1972. It has, I believe, a Mercruiser 888 or something similar but perhaps earlier. Ford 302 V8, engine is not marked "Mercruiser" anywhere but it is an 888 Outdrive. Has aftermarket...

[PatrickMonahan]

I have a 40HP Mariner 6E9 engine and it runs very well up until high RPM'S at WOT and bogs down, I observe that when I put it into gear it moves a bit, the linkage to shoves the magneto linkage moves up a small bit( fully advanced in youtube video below)...

[Larry J Roth]

Good day to you all. I have a GM Mercruiser 5.0, 1999, Carbureted, Alpha One Gen II, Thunderbolt IV apparently. There is no knock module or sensor. The timing is set at 500 RPM to 10 degrees BTDC. Upon opening of the throttle, it momentarily drops to...

[adg]

Hello again,

after the mechanical things I have done on the motor I wanted to figure out why it is not running smooth. Now today I did a compression test and checked with the timing light. It is my first time ever to use a timing light...

[mike_kern]

I have a 1988 Evinrude 25 (E25RLCCA) that has a case of the hiccups. I just got this engine out and going after sitting for several years. It was put away because of a cracked carb and that is now replace and at the same time I did an impeller, gear...

[elong0916]

Hello, I have a 2000 Tohatsu M40C I have fixed a couple problems on but still has an issue that I'm trying to figure out.

When running on muffs or in a 50 gal barrel it will start and idle smoothly in neutral or forward gear all day. ...

[sugarfish]

Im looking for a bit of advice on a 15 hp, Johnson 1995 tiller arm rope start on a little dingy I have in the Bahamas.. It has been really reliable for me for a couple years now, with just some carb problems that is pretty standard with the dodgy fuel

[Fiftybucks]

hi all,
i have a 1983 115 inline 6 serial no. 6541265 that i am trying to get in tip top running condition. I am new to outboards but have had mercruiser i/o most of my life. i am handy but no experience with any outboards. I will be getting...

[stuie1982]

Hello,

New to this form but see there are loads of knowledgeable folks on here so hoping someone can help.

I have recently almost completed a project where I'm trying to make a good outboard out of 2 almost 100% identical...

[Jonny evin]

If anyone can help Im sure you can, If you choose to please.

I have an 1984 evinrude 60hp 2 cyl E60tlc.

It would only run for 5-20 mins max it had spark and fuel and compression but would only start after about an hour once...

[guymd]

1972 110 9.8 mercury ser.# 3263263 thru 3795657, 120+psi x 2, clean carb, gets spark, new flywheel key, rebuilt pump, all new gaskets/rings. Hard start, when you close the choke and pull it the gas comes pouring out the carb throat. When i pull the plugs...

[Abomb27]

Hi, I have a 1996 Four Winns Fling with an OMC 115 turbojet. The boat runs well except that it tops out at 4,800 rpms and 36 mph. Factory specs for this motor is wot is between 4,500 rpms and 5,500 rpms. My question is how far can I retard the timing...

[rockeater]

Evening everyone,
I started the boat today after a one year overhaul and it felt great. However, I have a question on proper timing. I set the timing to 8 degrees btdc. I have read that it should be 4,6, or 8. So my question is which is the...

[Joeltawes]

Let me start by saying I don't know very much about boats or motors lol this is my first boat and decided to upgrade the motor.. Found a 90 hp mercury from CL. Got it as a project. Now I'm stuck lol. 0D136181.. New battery, starter, plugs and controls...the...

[kawiman20]

I am timing my force 125 and would like to see if im correct in doing so.
on the flywheel there is 1 mark on the flywheel that lines up with the mark on the plate above the carbs and that is TDC. when in neutral and timing gun on first cylinder...

[Spanish#007]

I wasn't sure if it would be big enough to provide sufficient back pressure to adjust the timing and throttle, currently the idle screw is all the way screwed in and I want to adjust everything to get it running smooth again...right now with the idle...

[e2firefighter]

I have a 1978 Chrysler 360 inboard that runs and revs fine while in neutral. In gear I can accelerate up to 1000-1200 rpms which is just barely moving me. Beyond this point it takes me a long time of creeping on and off the throttle (in an effort to...