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LEHR 9.9hp Propane Powered Outboard Engine, Short Shaft, Manual Start

Model # 14244099Mfg # LP9.9S


Customer Reviews
In stock online.

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Product Description

The first propane-powered outboard engines, LEHR motors present an environmentally-friendly and cost-effective alternative to gasoline. Overhead-valve four-stroke engines run on 110-octane propane, and are eco-friendly with zero evaporative emissions, because propane, unlike gasoline, is not listed as a marine pollutant by the DOT. Propane is 50-times cleaner than gas, with 96% less carcinogenic compounds, 60-70% less smog-producing hydrocarbons and no Class I or II ozone-depleting chemicals. It’s also domestically produced, reducing our dependency on foreign oil.

LEHR outboards are easy starting with no choke and no priming, reliable with no carburetor gum-up or winterizing, economical because propane costs roughly half as much as gas. 9.9hp and 15hp models connect only to remote tanks and are complete with a 10' hose assembly. Remote tanks are sold separately.

Suggested Tank Options:

Composite Tanks

Standard Aluminum Tanks 



  •     Engine Type: 4-stroke OHV
  •     Engine Displacement: 212cc
  •     Shaft Length: 15"
  •     Weight: 87.7lb.
  •     Fuel: Propane (LPG)
  •     Fuel Tank Type: Remote tank (sold separately)
  •     Running Time: 11lb. remote tank: Throttle @ 5000rpm: approx. 2 1/2 hours; Throttle @ 3000rpm: approx. 6 hours - 17lb. remote tank: Throttle @ 5000rpm: approx. 4 hours; Throttle @ 3000rpm: approx. 9 hours
  •     Exhaust System: Through prop
  •     Ignition System: CDI
  •     Start: Manual
  •     Gearing: Forward, Neutral, Reverse
  •     Gear Ratio: 2.08:1
  •     Warranty: Three years

LEHR 9.9 Owner's Manual

Quick Start Guide LP9.9

Advantages of Using Propane

Propane Run Time




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by PowerReviews
LEHR 9.9hp Propane Powered Outboard Engine, Short Shaft, Manual Start

(based on 4 reviews)

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of respondents would recommend this to a friend.

Reviewed by 4 customers

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(1 of 1 customers found this review helpful)


do not buy this

By Steve

from MA


  • Good concept
  • No Fuel To Spill


  • Quality is low
  • Starter Rope Hard To Pull

Best Uses

  • Do not buy

Comments about LEHR 9.9hp Propane Powered Outboard Engine, Short Shaft, Manual Start:

Great concept with the propane power.

However that is it.
Very hard to pull the starter rope due to the high compression. There is no compression release. Quality of the hardware is not good. Lehr obviously sources the base engine from someone else and adds the propane carb to it. Cover latch is very flimsy and doesn't latch tightly. Cover rattles making lots of noise. No grease fittings for the tilt hinge. Oil dipstick hard to access.


  • Was this a gift?:
  • No

(2 of 2 customers found this review helpful)


a competitively priced piece of garbage

By tj waterman

from boston, ma



    • Cheaply Made
    • Not reliable
    • Rusting Up 10 Days Old

    Best Uses

    • Sea Anchor

    Comments about LEHR 9.9hp Propane Powered Outboard Engine, Short Shaft, Manual Start:

    I just bought this Lehr 9.9 new from a marine store near me about 2 weeks ago.I was in the market for a new engine for the sole purpose of reliability.I came across the lehr propane 9.9 and did some research. seems like a decent enough engine from all of the reviews.
    I brought it out on a lake for two test runs.the engine was perfect. a week later I took it to a small island on vacation to do it some fishing, and that's where the trouble started. first started having idle issues, it would start stalling on me.then it would bog down in the mid throttle. the cover was not manufactured correctly and rattled making a very loud sound at high RPMs.the engine progressively got harder and harder to start as time went on. and then finally died. it would not start again. also what looks like stainless steel bolts on the lower shaft are completely covered in rust from three days of being in saltwater. Throttle cable started to corrode. I can't imagine all of these engines being this poorly manufactured. I was looking forward to having a reliable clean engine. My experience with this engine has been very very poor.

    (4 of 5 customers found this review helpful)


    Runs like a champ

    By Melvin the boater

    from Punta Gorda fl


    • Idles Sweet
    • No fumes
    • Started On The First Pull


    • I Want A 100hp

    Best Uses

    • Fishing

    Comments about LEHR 9.9hp Propane Powered Outboard Engine, Short Shaft, Manual Start:

    I would like a bigger engine to put on my ski boat

    Service and delivery comments:

    every thing was good

    (16 of 23 customers found this review helpful)


    Very tough to start

    By seattlebrighton

    from Seattle, WA


    • Looks Nice Hook Up Easy


    • Very Tough To Start
    • Won't Go Into Reverse

    Best Uses

      Comments about LEHR 9.9hp Propane Powered Outboard Engine, Short Shaft, Manual Start:

      I mounted the motor, filled the oil to the proper level (not overfull), and hooked up water and propane.
      40 pulls later, no sign of turning over. I may have pushed the throttle too far (up to 1/3), so disconnected the propane and let it rest overnight. Next morning, I was able to start it after 40-ish pulls, in the driveway. It ran fine, once started.
      Got it in the water and it started after 30-ish pulls, then ran it for 15 minutes and shut it off.
      Now, it was REALLY tough to start. After 60 or 70 pulls, I was ready to give up. My 10-year old started praying and low and behold, the thing started.
      Anyway, I just tried to start it again in the driveway and no luck, after 60 or 70 pulls, at different, low throttle settings.
      I'm disappointed because I was hoping that my 14 year old could use it, but no way he's going to get it started.
      I'm hoping for some help or a replacement from the Seattle store right now.

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